Introduction To Brooks Glycerin Shoes
For over two decades, the Brooks Glycerin has been a top choice for runners seeking a smooth, cushioned ride. This neutral running shoe provides the ultimate in comfort and support, making it a favorite among runners of all levels. But with so many Glycerin models and variations available, how do you choose the right one? Let’s take a deep dive into the Glycerin line and explore what makes these shoes so popular.
The Glycerin Legacy of Cushioning
Brooks has always been known for their focus on cushioning and the Glycerin exemplifies this. The midsole features their signature DNA LOFT cushioning, using an adaptive foam that provides soft comfort without losing responsiveness and energy return. This innovative foam conforms to your foot, absorbing impact while also providing a springy toe-off for a smooth transition through each stride.
In addition to the DNA LOFT foam, newer models also incorporate DNA Zero and Omni Groove technologies for even more adaptive cushioning and improved transitions. The plush interior surrounds your foot in pillowy softness, while the full-length segmented crash pad ensures stability and support.
Why Women Love Glycerin Shoes
The Glycerin’s luxurious cushioning makes it a great choice for women runners, who are more prone to injuries from impact due to anatomical differences. The soft yet responsive midsole protects joints and helps prevent injuries related to pounding the pavement.
Many runners also praise the Glycerin’s roomy fit that accommodates swelling feet on long runs. The breathable mesh upper conforms comfortably without irritating sensitive areas. Additionally, the Glycerin offers medial and arch support to provide stability for overpronators.
Comparing Glycerin Models: What’s the Difference?
Understanding the differences between Glycerin models can help you pick the right one for your needs:
- Glycerin GTS – Maximum stability with GuideRails support.
- Glycerin – Cushioned neutral option.
- Glycerin GTS Women’s – Stability for women with narrower heels.
- Glycerin Women’s – Neutral version designed for women’s feet.
The Women’s editions have a narrower heel, lower height midsole, and gender-specific cushioning for smaller feet. The neutral Glycerin offers more flexibility while the GTS models provide motion control for overpronators.
Choosing Your Ideal Glycerin Shoe
Consider your foot type, running gait, mileage, and fit preferences when picking a Glycerin model. Here are some tips:
- Overpronators need stability – go for Glycerin GTS.
- Heavier runners and high-mileage trainers need max cushioning.
- Narrower feet fit better in the Women’s editions.
- Lighter runners can opt for more flexibility from the neutral version.
- Always try several sizes since Glycerin runs short.
Talk with a knowledgeable running store associate for help determining the ideal Glycerin shoe based on your individual needs.
Key Glycerin Features to Look For
While all Glycerin models provide an ultra-cushioned ride, other elements differ between versions:
- Mesh uppers for breathability.
- Plush internal linings that pamper your feet.
- Omni Grooves for fluid transitions.
- GuideRails technology for stability.
- Gender-specific designs and sizing.
- DNA LOFT responsive cushioning.
- Segmented crash pads for smoothing the heel strike.
Consider which features would be most beneficial for you based on your foot, gait, and preferences.
Finding the Perfect Fit
The Glycerin runs short so be sure to try on several sizes. Ideal fit means:
- A thumb’s width between longest toe and end of shoe.
- Heel secured in place without slipping.
- No uncomfortable pressure spots.
- Enough room to splay toes while standing.
The plush interior will conform to your foot so don’t size up too much. An ideal fit allows your foot to move naturally while feeling cradled and supported.
Style and Color Options
While performance takes precedence, the Glycerin also offers attractive style options. Modern color combinations and sleek profiles provide a shoe you can wear proudly around town. Popular options include:
- Black/Rose Gold – chic metallic accents.
- Blue/Green – vibrant color pops.
- Gray/Pink – bold meets subtle.
- Triple Black – timeless classic.
New seasonal colorways are introduced frequently so you can stay on trend. There are also special collaborations and limited editions worth checking out.
Where to Buy Glycerin Shoes
Finding the best deals on Glycerin shoes means checking:
- Brooks website – access full range of models.
- Running specialty retailers – expert fitting guidance.
- Online discount sites – score sale prices.
- Clearance sections – previous season’s styles at reduced costs.
Be wary of unauthorized sellers offering fake Glycerins at too-good-to-be-true prices. Your best bet is an authorized Brooks dealer who can authenticate the shoes.
Breaking In Your Glycerin Shoes
Help your new Glycerins reach their maximum comfort potential by following these tips:
- Wear them around the house to begin breaking in.
- Use them for short, easy runs at first.
- Tighten laces progressively from bottom up.
- Consider using aftermarket insoles for extra cushion.
- Allow 48 hours between first few runs to adapt.
As the DNA LOFT foam molds to your foot, the Glycerin will deliver an increasingly plush, customized feel. Be patient during the break-in period to safely transition into your new shoes.
Using Glycerin Shoes for Different Runs
The Glycerin’s responsive cushioning makes it ideal for:
- Long, slow distance runs.
- Recovery days and easy mileage.
- Long tempo sessions and progression runs.
- Marathon and half marathon racing.
The flexible platform and DNA LOFT foam provides both cushioning and energy return for runs of all paces and distances. Glycerins can tackle everything from intervals to ultra distances.
Caring for Your Glycerin Shoes
Help your Glycerins go the distance with proper care between runs:
- Allow shoes to air and dry out completely.
- Use a shoe tree to maintain shape.
- Clean dirt and debris from outsole.
- Sanitize inners with anti-odor sprays.
- Replace insoles regularly.
Don’t machine wash or dry your Glycerins – this can degrade the materials. With proper care, your shoes can last 500+ miles.
Maximizing Glycerin Shoe Lifespan
You can safely log 500-600 miles in Glycerins before replacement by:
- Rotating with multiple pairs.
- Tracking mileage with a running app.
- Replacing insoles around 300 miles.
- Retiring shoes once cushioning feels flat.
Replace sooner if you notice excessive wear patterns, foot pain or changes in fit. Record mileage so you know when it’s time for a fresh pair.
Reviews of Top Women’s Glycerin Shoes
Runner’s World and other experts consistently rate Glycerin shoes among the best cushioned trainers. Here are highlights of the top women’s models:
- Glycerin GTS 19 – “Luxurious ride and stability”
- Glycerin 17 – “DNA LOFT delivers delightful softness”
- Glycerin GTS Women’s 18 – “Marshmallow-y delight for overpronators”
- Glycerin 15 Women’s – “Balances personalized comfort and versatility”
Reviewers praise the DNA LOFT cushioning along with roomy fits and premium feel across Glycerin models. Brooks continues improving shock absorption and energy return with each iteration.
Choosing Your Perfect Glycerin Shoe
With an understanding of the technologies and specialized options available, you can confidently select the ideal Glycerin model for your needs. Key considerations include fit, foot type, mileage, purpose and personal preferences. Take time to try on options from local retailers to find the luxuriously cushioned Glycerin that keeps you running in complete comfort.
Benefits Of Glycerin Shoes For Women Runners
For women runners looking to log those miles in comfort, Brooks Glycerin shoes should be at the top of your list. The Glycerin line has long been a favorite for runners seeking a smooth, cushioned ride. But what exactly makes these shoes so great for women specifically? Let’s take a closer look at some of the key benefits Glycerin shoes offer female runners.
Plush Cushioning
The hallmark of Glycerin shoes is their ultra-soft cushioning. Brooks uses their proprietary DNA LOFT midsole foam which provides pillowy softness underfoot without losing responsiveness. This cushy cushioning does wonders for absorbing impact and reducing fatigue. Women, who tend to have lower body mass than men, particularly benefit from the extra midsole padding. The result is happy feet that still have a spring in their step mile after mile.
Ideal Fit for Female Feet
Brooks engineers their shoes using biomechanical data from real runners – both men and women. What they’ve found is that female feet tend to be narrower across the heel and midfoot, with a higher instep. To accommodate this, Glycerin shoes are built on a women’s-specific last. This creates a contoured shape with a snugger fit through the midfoot, preventing sliding around inside the shoe. The plush interior lining also prevents blisters or hot spots. Glycerin shoes basically give you a custom shoe fit without the custom price tag.
Soft & Supportive Upper
Glycerin shoes feature an engineered mesh upper made of soft, flexible materials. The bootie construction wraps your foot securely without any bothersome seams or stitching. Strategically placed overlays provide just the right amount of structure and support. However, the upper still maintains a good degree of stretch to move naturally with your foot. This combination of softness and support really complements the female foot. You’ll be comfy yet still stabilized mile after mile.
Smooth Heel-to-Toe Transition
Transitioning your weight from heel to toe while running can cause jarring if the midsole is too firm. Glycerin shoes incorporate GuideRails support near the heels to guide your foot through a smooth heel-to-toe transition. This allows the shoes to softly adapt to your natural gait cycle. For women, who tend to land more toward the outer heels when running, this integrated support is key. It prevents excessive inward rolling of the foot after initial impact. The result is a fluid heel-to-toe stride.
Durable Outsole Traction
Don’t let the soft cushioning fool you – Glycerin shoes also sport a rugged outsole. Strategic rubber placement in high-wear areas provides durable traction mile after mile. Flex grooves in the forefoot promote natural flexibility and flow. The outsole rubber also wraps up onto the toe tip for extra protection. This combination of traction and flexibility allows you to pick up the pace when needed without losing stability. No need to sacrifice a smooth ride for durability with the Glycerin line.
Lightweight Support
Glycerin shoes strike an ideal balance of being well-cushioned yet still lightweight. The streamlined upper materials and DNA LOFT foam midsole provide comfort without bulk. For women, who have less muscle mass than men on average, running in heavy shoes can sap energy and stamina. The Glycerin line averages around 9.2oz for a women’s size 8. This feather-light feel allows you to run unencumbered while still benefiting from the DNA LOFT cushioning.
Responsive Ride
While the Glycerin line provides a supremely soft feeling underfoot, the shoes still remain responsive. The midsole foam maintains a good amount of bounce-back to put a little “spring” in your stride. An internal stretch bootie construction also adapts to your foot’s natural expansion and contraction while running. This creates a smooth, dynamic ride over changing terrain. Women tend to exhibit greater biomechanical flexibility than men while running. Glycerin shoes mirror that flexible trait mile after mile.
Moisture-Managing Lining
Nobody likes squishy, sweaty feet when running. Thankfully Glycerin shoes incorporate a specially engineered mesh lining to keep your feet feeling fresher. The 3D Fit Print lining has been shown to reduce sweat build-up compared to more traditional mesh linings. By better managing moisture, it helps prevent irritation, blisters, and funky odors from developing inside your shoes. Female feet tend to be slightly narrower with a higher arch, making moisture management even more critical.
Extended Size Range
Finding the perfect fitting running shoe can be tricky, but Glycerin shoes are available in an extended size range. Women can choose from narrow to wide widths, accommodating more foot shapes. For those needing smaller or larger sizes, Glycerin shoes scale down to 5.0 and up to 13.0. Having this wide spectrum of sizes allows more women to experience the magic of Glycerin’s plush ride. No more settling for almost-right sizes!
Clearly Glycerin shoes have the ingredients to provide women runners with the ultimate in cushy comfort without sacrificing responsiveness. From the DNA LOFT cushioning to the 3D Fit Print lining, Brooks engineers these shoes with the female foot in mind. While everyone’s feet are slightly different, the consistent praise Glycerin shoes receive is proof these are some of the best women’s running shoes around. Lace up a pair and your feet may never look back.
Glycerin GTS Vs. Glycerin GTS Women’s
Brooks’ Glycerin line has long been a go-to for runners seeking a smooth, cushioned ride. The Glycerin GTS and Glycerin GTS Women’s models share many similarities but also have key differences that female runners should consider.
Cushioning
Both versions utilize Brooks’ plush DNA LOFT cushioning in the midsole, providing a soft yet responsive feel underfoot. This proprietary foam quickly adapts to your stride while delivering energy return and lasting cushioning over miles. The segmental crash pad in the heels also ensures a smooth transition from heel to toe.
Differences in Fit
While both models share a comfortable feel, the Women’s version dialed in the fit for the female foot. The streamlined mesh upper better accommodates narrower heels and midfeet that women tend to have. An adjustable saddle construction in the midfoot prevents sliding around inside the shoe. The Women’s model also has more room in the toe box for comfort. Sizing goes down to 5.0 for smaller female feet.
Targeted Arch Support
Since women’s feet tend to have a higher arch on average, the Glycerin GTS Women’s model provides a touch more arch support. This comes from the 3D Fit Print framework integrated into the midsole, allowing for dynamic support right where you need it. The result is a shoe that better aligns with the contours of the female foot.
GuideRails Support
Both versions incorporate GuideRails support near the heels, guiding your foot gently through the gait cycle. This prevents excessive inward rolling after footstrike. But for women who tend to be more biomechanically flexible while running, this integrated motion control is key. It allows female runners to flow through a smooth, natural stride.
Moisture-Managing Lining
The biggest difference is the Women’s model incorporates a specially engineered mesh lining called Nav Band. This lining has moisture-managing fibers woven in to actively keep feet drier. By better wicking away sweat, it helps prevent irritation and blisters inside the shoe. Since women have slightly narrower feet that produce more sweat, moisture control is critical.
Weight
In terms of weight, there is little difference between the models. The Women’s version clocks in at 9.2oz while the standard Glycerin GTS averages around 10.5oz. Both utilize lightweight mesh in the uppers. Given the smaller muscle mass most women have, lightweight shoes can help prevent fatigue over long runs.
Durability
While both models offer responsive cushioning, they don’t sacrifice durability in the process. High-wear rubber in the heel and forefoot provides protection right where you need it. Blown rubber forefoot pads also add flexibility for smooth toe-offs. The all-rubber outsole wraps up onto the toe tip for extra protection as well.
Versatile Performance
With their blend of soft cushioning and balanced support, both the Glycerin GTS and Glycerin GTS Women’s can handle a wide range of running. The shoes provide great shock absorption for higher mileage training but can also pick up the pace when needed. The fit scales for narrow to wide widths too.
Sizing Options
A key advantage of the Women’s specific model is the extended sizing range on the smaller end of the spectrum. While the standard Glycerin GTS goes down to a men’s size 7, the Women’s version starts at a size 5. For female runners who need a more precise shoe fit, this smaller sizing is crucial.
At the end of the day, choosing between the Glycerin GTS or Glycerin GTS Women’s comes down to fit. The DNA LOFT cushioning provides that hallmark soft feel either way. But with its dialed-in fit, moisture managing lining, and smaller size range, the Women’s version goes the extra mile to give female runners the custom feel they need. For women wanting max comfort no matter how far the run, the Glycerin GTS Women’s is primed to deliver.
Choosing The Right Glycerin Model And Type
When it comes to finding the perfect pair of running shoes, women often struggle to find the right fit and feel. The Brooks Glycerin has long been a popular choice for female runners looking for a lightweight yet cushioned ride. With so many models and iterations over the years, it can be tricky to know which Brooks Glycerin is right for you. This guide will walk you through the key factors to consider when choosing Brooks Glycerin shoes as a woman.
Understand Your Foot Type
The first step is identifying your foot type – do you have a neutral stride, overpronate, or underpronate? Overpronation means your foot rolls inward too much when you run, while underpronation means it stays rigid and doesn’t roll enough. Knowing this will help determine the type of support and cushioning you need. Women tend to overpronate more than men. If you aren’t sure, visit a specialty running store and have your gait analyzed.
Consider Arch Height
The Glycerin offers options for low, medium, and high arches. Measure your arch by wetting your foot and stepping on cardboard or construction paper. A low arch will show almost all of your footprint. A high arch will leave just the outside edges. Those with low arches should look for Glycerin models with maximum cushioning and support features. High arches do better with a more flexible shoe.
Understand the Models
Brooks releases a new version of the Glycerin model every year or two. While the changes are subtle, each iteration tweaks things like weight, cushioning, and fit. Glycerin GTS stands for “Go-To Shoe” and offers support for overpronation. Non-GTS models provide a more neutral ride. Consider what year models are available and what technology differences there may be.
Factor in Mileage
How many miles do you currently run each week? For those running 10 or less, the Glycerin may provide more shoe than you need. The Glycerin excels at cushioning higher mileage runners from impact while still providing responsiveness. If you’re a lower mileage runner, you may fare better in the Ghost or Launch models.
Mind the Offset
The offset of a shoe refers to the difference in the height of the heel compared to the forefoot. The Glycerin typically has an offset around 10mm which provides a smooth transition from heel to toe. A higher offset is suitable for heel strikers. Make sure the offset matches your natural gait.
Consider Sizing Up
The Glycerin runs slightly small and narrow. Consider ordering a half or full size up from your normal shoe size for a more comfortable fit. Brooks also makes Glycerin models in wide sizing for those needing a roomier toe box. Be sure there is ample room to splay your toes while running.
Try Them On
There’s no substitute for lace-up testing. Be sure to try Glycerins on at the end of the day when your feet are most swollen. Bring along your typical running socks. Ideal fit means space for your toes to wiggle and no heel slippage when walking or running. Take them for a jog around the store to test cushioning and support.
Give Yourself Time to Adjust
Don’t expect a perfect feel right out of the box. Allow around 10-15 runs for your body to adjust to new shoes, especially if you’re transitioning from a drastically different model. The Glycerin has a very plush feel—it may seem almost too squishy at first until you adapt.
Consider Where You’ll Run
Will you run primarily on roads, trails, or a track? The Glycerin performs best on the roads with its ample cushioning. These aren’t the best shoes for speed work or aggressive tread. Make sure the intended terrain matches the shoe’s strengths.
Mind the Wear
Inspect the midsole closely when trying on any model. Compressed or creased foam means a shoe is past its prime. Average Glycerin lifespan is 300-500 miles. Heavier runners or those regularly logging high mileage may get less. The outsole rubber will also show signs of wear over time.
Rotate Shoes
Rotating running shoes from day to day gives each pair time to fully rebound. This extends their lifespan. Consider getting two pairs of Glycerins to alternate. Or complement them with a different shoe from your wardrobe for variety.
Think About Budget
Glycerins retail around $150 but can be found discounted or on sale previous season models. Determine how much you can invest for a quality pair that will go the distance. You generally get what you pay for with running shoes.
Read Reviews
Don’t just rely on Brooks’ descriptions. Look for honest assessments from other runners who have tested them. See what women specifically have to say about sizing, comfort, and durability after putting real miles on the Glycerins.
With an understanding of the available Glycerin models and technologies along with your individual needs and running style, you’re now equipped to select the optimal Brooks Glycerin shoes. Taking the time to find that perfect pair means happy feet and smooth miles ahead.
Features To Consider When Picking Glycerin Shoes
The Brooks Glycerin running shoe has long been a go-to option for female runners seeking a comfortable yet responsive feel. But with so many updates and models over the years, how do you pick the right Glycerin for you? Here are the top factors to weigh when finding that perfect fit and cushioned ride.
Cushioning Level
A hallmark of the Glycerin is plush cushioning, but some models amp it up more than others. Look at midsole foam thickness and technology to determine the softness and energy return you prefer. If you want maximum softness for high mileage, seek out the models with DNA Loft or Super DNA cushioning. If you still need padding but with more ground feel, options like DNA Flash may work better.
Overall Fit and Feel
It’s vital to understand the overall fit and feel of the latest Glycerin version. Some may size small while others have a wider toe box. Trying them on is a must. Walk around the store and even jog a bit to test the flexibility through your stride. The upper mesh can vary to impact breathability and stretch. Don’t assume the fit will be the same across models.
Weight
Ounces matter when it comes to running shoes. Newer Glycerins utilize data to remove excess weight from non-essential areas. Looking at specs can give you a sense of changes, but be sure to test the real in-hand weight before buying. The Glycerin shouldn’t feel too dense or clunky on your feet when in motion.
Offset Height
The offset of a shoe is the difference in the height of the heel compared to the forefoot. This affects your stride and transition. The Glycerin tends to have an offset around 10mm but verify the exact specs. A higher offset accommodates heel strikers while lower offsets promote a faster turnover.
Intended Use
Figure out if you need the Glycerin for training runs, race day, or recovery jogs. The versatile Glycerin can handle a range of uses, but newer models may optimize things like responsiveness for speedwork or a wider platform for easy miles. Test run at your typical paces to see how they feel.
Outsole Design
The outsole impacts traction and durability. Look for solid rubber coverage in a tread pattern that matches your needs. Segmented crash pads that allow flexibility are also key. If running on varied terrain, consider trail or hybrid models with additional grip. The outsole should match intended surfaces.
Support Features
If you overpronate, seek out Glycerin GTS models that have external support like a firmer midsole post. If you need a more stabilized ride as a neutral runner, see if guide rails or midsole pods are integrated. Trying shoes on while moving side to side assesses support and control.
Breathability
Nothing ruins a run more than hot, sweaty feet. Inspect the upper fabric for ventilation and properties like moisture wicking. Mesh density impacts airflow. Some models incorporate heat mapping data to target breathability in sweat-prone areas. Well-ventilated shoes help keep feet cool and dry.
Durability
The Glycerin needs to go the distance, both in mileage and years on your shelf as newer versions release. Inspect midsole foam for creasing and rubber outsoles for wear. Online reviews can reveal potential weak spots. Shoes lasting 300-500 miles are ideal for the average runner.
Style and Color Options
Function reigns supreme, but runners still appreciate stylish shoes. Browse the colorways and patterns available each season. Vibrant colors and fun accents add personality. And be sure to check sizing if selecting a different style than your normal run-of-the-mill trainer.
Price
Glycerins retail around $150 but can be found on sale, especially previous year models. Factor in your budget constraints. While more expensive shoes often equate to better performance and longevity, you can still find quality at lower price points as well.
By carefully examining cushioning, fit, support, and other elements, you can discover the ideal Brooks Glycerin match. Analyze your individual needs and preferences, then select the model offering the best blend of plush comfort and lively energy return for empowering your miles.
Cushioning Systems Used In Glycerin Shoes
As an avid runner, finding the perfect pair of shoes is crucial for comfort, performance, and injury prevention. For those seeking a well-cushioned shoe, the Brooks Glycerin has long been a top choice. But with so many options on the market, how do you know if the Glycerin is right for you? Let’s explore the key cushioning systems used in Glycerin shoes to understand what makes them unique.
At the heart of every Glycerin shoe is the Super DNA midsole cushioning. This proprietary foam material is designed to provide soft comfort underfoot without losing responsiveness. The midsole contours to the individual footstrike and offers 25% more adaptability than standard EVA foams. Brooks uses a full-length Super DNA midsole in the Glycerin for consistent comfort from heel to toe.
In addition to the Super DNA foam, Brooks incorporates its GuideRails support system into the Glycerin models. GuideRails are built into the midsole and consist of a support post to help control excessive pronation. This prevents the ankle from rolling inward too much and causing injury over time. The GuideRails offer a great balance of soft cushioning and support for moderate to severe overpronators.
The most recent Glycerin 19 has an OrthoLite insole which includes an EcoPassport certified foam package. This insole offers cooling properties to help keep feet drier. It also has an anti-microbial treatment to inhibit odor-causing bacteria. The removable insole allows you to insert custom orthotics if needed.
In the outsole, Brooks uses its HPR Plus rubber material which is a high-abrasion resistant rubber. It’s concentrated in the heel and high-impact areas for enhanced durability without adding stiffness to the shoe. Flex grooves in the outsole improve flexibility in the forefoot as you move through your gait cycle.
The plush interior lining of the Glycerin utilizes an Element Mesh that is highly breathable and moisture-wicking. This creates a cooler and drier foot environment. A 3D Stretch Print Saddle wraps the midfoot for a secure fit in the upper. It adapts to your foot as it moves through the gait cycle.
Additional features include a plush tongue and collar for added comfort around the ankle. Reflective accents improve visibility for early morning and evening runners. The Glycerin also utilizes Brooks’ Round Toe Box to allow your toes to relax and spread out naturally.
Finding the Right Model
With the key technologies covered, how do you choose the right Glycerin model for you? Here are some tips:
- Consider your arch type and pronation. If you have medium to high arches, the standard Glycerin provides great neutral cushioning. If you overpronate, look to the Glycerin GTS for built-in GuideRails support.
- Analyze your gait and where you typically strike your foot. Heel strikers may prefer additional rearfoot gel units found in some models like the Glycerin 19.
- Choose your ideal offset. The offset is the difference in thickness between the heel and toe of the shoe. A 10mm drop is common in the Glycerin, but some models have 8mm or 12mm options.
- Consider sizing up a half or full size, as the Glycerin runs slightly small. Trying shoes on in-store is recommended.
- Rotate between different Glycerin models rather than using the same version for all training. This helps strengthen different muscles and joints.
The Glycerin for All Types of Runners
While accommodating various foot types, the Glycerin is designed with the neutral runner in mind. The consistent cushioning from heel to toe makes it an excellent choice for longer training runs at easy paces. The Glycerin shines for runners seeking a comfortable daily trainer.
However, don’t be afraid to take the Glycerin for the occasional speed workout or race day! The Super DNA foam delivers a responsive, energetic ride. The full ground contact outsole offers smooth transitions. While not the most speed-focused shoe, the Glycerin can certainly pick up the pace when called upon.
From beginners to experienced runners, the Brooks Glycerin remains a top neutral shoe year after year. The highly cushioned and supportive ride make it popular across age groups and ability levels. For healthy training and everyday mileage, the Glycerin is hard to beat.
Have you found your perfect Glycerin match? Understanding the technology inside these well-cushioned shoes can help you find your ideal pair. With the right Glycerin model, you’ll be on your way to happy training miles in plush comfort.
Sizing Tips For Finding The Perfect Glycerin Fit
With the wide range of Brooks Glycerin models to choose from, finding your ideal size is key to maximizing the benefits. The Glycerin is known for its plush cushioning and smooth ride, but an improper fit can lead to slipping, blisters, or discomfort on your runs. Use these helpful sizing tips to find the perfect Glycerin fit for your feet.
Understand Glycerin Sizing
The Brooks Glycerin runs slightly small in general. While it’s offered in standard width options, the toe box is more rounded than other neutral trainers. Trying the shoes on in-store is ideal, but if buying online consider sizing up a half or full size from your normal running shoe length. For example, if you typically wear a size 8, try an 8.5 or 9 in the Glycerins.
This varies slightly across models. The Glycerin 19 with its stretch knit upper may allow you to stick with your regular size, while the Glycerin 18 or GTS models may fit more snug. Pay attention to reviews of the specific version you’re eyeing for best insight on fit.
Analyze Your Foot Shape
Those with wider feet or high insteps may want to size up a full 1.5 sizes in the Glycerin rather than just a half size. The Glycerin’s rounded toe box, while comfortable for many, can be too narrow for some foot shapes. If you have wide feet, look for reviewer comments on finding enough room in the forefoot.
Runners with high arches should also be cautious with sizing. The plush cushioning takes up midsole space, so those needing extra vertical room for their arches may want to consider sizing up. Again, trying shoes on in the store allows you to better gauge fit if you have wider or higher volume feet.
Consider Your Sock Choices
The socks you plan to train in can influence your ideal Glycerin size. If you predominantly run in thin, lightweight socks, sizing up a half or full size gives room for your feet to expand naturally when running. Runners who prefer thick, heavily-cushioned socks may be able to stick with their normal shoe size.
Keep in mind that thicker socks can impact stability and motion control in some shoes. The Glycerin’s neutral platform gives it more flexibility to accommodate varying sock types. Focus on overall fit and comfort rather than sock thickness alone.
Analyze Your Runs
How you plan to use the Glycerins can provide insight on ideal sizing. If you’re seeking an everyday road runner for moderate pace training, consider sizing up half a size to allow room for foot swelling on longer runs. Sizing up also gives flexibility if you want to use custom orthotics.
For short, fast runs you may opt for your regular size or just a half size up. Race day Glycerins can be fitted more snugly since your feet won’t expand as much at faster paces. Just be sure to get in a few test runs first to experiment with fit and comfort.
Consider Adjustable Lacing
If sized properly, the Glycerin upper should securely cradle your midfoot without excessive pressure. However, lacing techniques can give you more options for customizing fit. Try loosening laces over the top of the foot or using a heel lock to reduce pressure across the instep or ankles if needed.
Also consider trying alternative lacing methods like skipping eyelets if one area feels too snug. Getting the toe box width right and opting for the right 1/2 to full size up will still make the biggest sizing impact. But small lacing tweaks can enhance your fit.
Focus on Comfort
While considering size guidelines, foot shape, sock choice, and runs, don’t forget about comfort. The Glycerin models are praised for their plush cushioning underfoot. Ensuring you have ample room to enjoy that soft Super DNA foam ride is key.
Pressure that’s mildly uncomfortable when trying on shoes in the store will only feel worse when running miles outside. Don’t be afraid to size up or explore other lace-up techniques until your Glycerins feel like slippers.
With some wear testing and attentiveness to fit, you’ll find your perfect Glycerin match. This dependable neutral trainer can then accompany you on all your road adventures in comfort and style. Cruise through your miles with a smile once you dial in the ideal size.
Style And Color Options For Glycerin Shoes
With its ultra-cushioned ride perfect for logging miles, the Brooks Glycerin is a go-to neutral running shoe. But functionality isn’t the only factor when selecting new trainers. Having stylish looks and colors you love can make getting out the door for a run that much more exciting.
Let’s explore the array of style and color options across Glycerin models so you can choose the perfect pair to match your personality and tastes.
Traditional Styling with Modern Touches
Brooks sticks to a classic running shoe silhouette with the Glycerin franchise, but adds modern sculpting details. The rounded toe box provides room for toes to splay and a seamless interior liner reduces irritation. Stretch knit upper materials and internal FitPrint 3D Stretch Print saddles offer structure with some give.
Depending on the model, you’ll find contemporary prints and patterns overlaid on the engineered mesh uppers. The Glycerin 19 brought shadows dots and a translucent midfoot cage into the mix. Style-wise the Glycerin falls in the middle between a sleek racing flat and a chunky maximalist trainer.
Complement Your Running Clothes
With a neutral palette spanning multiple shades, it’s easy to find Glycerins to complement your run gear. Pairing shoes that pop against your black running tights or providing a color match to your reflective vest boosts your coordination.
Bright white or bold citrus and pink shades in some models allow you to make a statement. While others in navy, grey, or Brooks’ signature green offer more versatility and are less likely to show dirt. Consider the colors you feel most confident in when narrowing your selections.
Special Edition Collaborations
In addition to its core color offerings each season, Brooks frequently releases special make-ups of the Glycerin. Collaborations with athletes like Des Linden and organizations like the Beastie Boys have brought unique stylings.
For example, the 2022 Beastie Boys capsule featured an embroidered logo and graphic prints as a nod to the band’s iconic music. These collaborations often sell out quickly and provide stylish pieces for your collection.
Mixing in Multiple Pairs
While the Glycerin models share an overall look, small variations in prints, overlays and contrasting colors allow you to choose more than one. Rotate different Bold Berry, Black/Pink Peacoat, or Teal/Jade shades for versatility.
Alternate between an understated grey Glycerin 18 for some days and the vibrant Fierce Floral Glycerin GTS 19 on others. Mixing pairs keeps your feet happier and gives you options in matching different outfits.
Finding Your Favorites
With so many choices, it can be difficult to select your perfect Glycerin style and colorway. Consider what tones you consistently reach for in your apparel. Seek shades that inspire you to run when you put them on.
If you frequently run outdoors, brighter colors can provide visibility and pop. Sticking to darker or neutral hues that disguise dirt may suit low-maintenance types. Above all, choose a Glycerin style that makes you smile so you’re excited to lace up.
Style That Performs
The Glycerin franchise has retained its recognizable silhouette and branding elements like the diagonal overlays for good reason – the classic style reliably performs. While keeping key functional features in place, Brooks refreshes the Glycerin each season with new prints, patterns, and colors to keep runners looking and feeling good on their runs.
With style playing an important role in shoe selection for many runners, the Glycerin offers diversity. Finding your favorite looks among the range of options will have you taking your training in comfort and confidence.
Where To Buy Glycerin Shoes Online And In Stores
With its unparalleled cushioning and smooth ride, it’s no wonder the Brooks Glycerin remains a top choice for runners seeking a comfortable neutral trainer. But where can you get your hands on these popular shoes? Here’s a look at where to buy Glycerin models both online and in retail stores.
Brooks Website
As you might expect, Brooks’ own website (brooksrunning.com) carries the full selection of Glycerin models and colors. Brooks offers free shipping and returns on all orders. Purchasing directly from the brand’s site also typically provides access to new releases and limited edition collaborations soonest.
Signing up for a free Brooks account allows you to earn reward points with purchases. Overall, Brooks’ website provides a convenient way to get your Glycerins straight from the source.
Running Specialty Retailers
Visiting a local running store to try on pairs remains one of the best ways to find the perfect Glycerin fit and feel. Specialty run retailers like Fleet Feet, JackRabbit, and others carry a wide range of Brooks shoes.
Their knowledgeable staff can watch you walk and run in different models to provide personalized recommendations. Many local stores also host weekly group runs where you can test out shoes before buying.
Amazon and Online Retailers
Popular online retailers like Amazon, Running Warehouse, Road Runner Sports, and Holabird Sports offer convenient shipping for Glycerin purchases. Amazon frequently has a wider range of sizing in stock across Glycerin models.
The downside is you can’t try shoes on through online retailers. Be sure to check return policies in case the fit isn’t right. Pay close attention to size charts and user reviews for helpful sizing guidance.
General Athletic Stores
Big box sporting goods stores like Dick’s Sporting Goods, Sports Authority, and Modell’s carry select Brooks running shoe models. However, they may have a more limited Glycerin selection focused on newer releases or exclusive versions.
The benefit of stores like Dick’s is you can try on shoes in-person to gauge fit and comfort. Take advantage of generous return timelines in case you change your mind after a test run.
Discounts and Offers
Shopping end of season sales both online and in running stores can net you Glycerin deals. Models being cleared out to make room for new versions see significant discounts ranging from 25% to over 50% off in some cases.
Retail sites like JackRabbit and Running Warehouse often run holiday sales offering site-wide discounts. Signing up for brand or retailer email lists gives early access to seasonal promotions.
Some Models Sell Out Quickly
Given the Glycerin’s popularity, be aware certain styles and colors sell out rapidly after new release launches. Special collaborations with unique prints or limited distributions have the most limited availability.
If you have your heart set on a certain look, consider pre-ordering or buying early in the launch cycle. Have backup colors or models in mind in case your first choice isn’t available in your size.
With numerous online and in-person options, finding your perfect pair of Glycerins is easier than ever. Get ready to enjoy plush cushioning and a smooth as butter ride with your new shoes!
Breaking In New Glycerin Shoes Properly
You eagerly opened the box of your brand new Brooks Glycerins, laced them up, and hit the road for a run. But that plush cushioning suddenly doesn’t feel so plush a few miles in. Foot pain and discomfort replace the expected soft, smooth ride.
What gives? Like most shoes, the Glycerin models require a proper break-in period to reach their maximum comfort potential. Follow these tips to gently loosen up your new Glycerins for happy training miles ahead.
1. Wear Them Casually First
Resist the urge to break in your Glycerins with an immediate long or hard workout. Instead, spend several days wearing them around the house and for casual errands like short walks. Let them mold to your feet during light activity.
The Glycerin’s rounded toe box needs time to adapt to your foot shape. Taking it slowly reduces pressure on toes and forefoot hot spots early on.
2. Do Shorter Runs to Start
Once your shoes get used to your feet through casual wear, begin running in your new Glycerins. But limit your first few runs to 2-3 miles with them. Keep running durations and distances short as you continue the break-in process.
Shorter runs apply lower impact forces to the midsole cushioning, allowing it to soften up without packing out. Build slowly into longer miles over the first couple weeks.
3. Mix Up Your Speeds
Incorporate variety in your break-in runs. Include different paces like strides, tempo sections, and steady state efforts. Varying your footstrike impact prepares the foam and guides for both slow and fast running.
Don’t do all easy runs or all speedwork in new shoes. Blend training paces for a well-rounded break-in reflecting your typical running routine.
4. Choose Softer Surfaces
Run your first few Glycerin runs on grass, trails, tracks or dirt instead of hard concrete and asphalt. Softer surfaces gently eases your shoes through the adaptation process to your specific gait.
Once the Glycerins adjust after a couple weeks, you can transition to roads without increased injury risk. But stick to lower impact environments in the beginning.
5. Monitor Hotspots
Pay attention to any foot hotspots or rubbing that emerges in your new shoes, especially during and after that first couple wears. Targeted lacing adjustments or light sock changes can help reduce friction in problem areas.
Some rubbing and pressure is normal during break-in as your foot settles into place. But excessive or lingering pain indicates a poor shoe fit.
6. Consider Aftermarket Insoles
Swapping the Glycerin’s factory insole for an aftermarket option can accelerate comfort during break-in. Insoles provide a custom moldable fit and supplemental cushioning from wear one.
Anti-friction insoles also reduce irritation. But give the shoes a test run or two before changing insoles to gauge default fit.
7. Check Midsole Wear
The Glycerin’s Super DNA and GuideRails foam will compress and respond to your foot’s shape during break-in. But excessive midsole wear, creasing, or density changes early on may signal durability issues.
Some wrinkling and softening is normal. Signs of premature deterioration could indicate a faulty pair needing replacement under warranty.
Breaking in any new running shoe properly requires patience and care. But follow these tips, and your Glycerins will reward you with plush cushioning for hundreds of blissful miles ahead.
Using Glycerin For Different Types Of Runs
With its soft, smooth ride, the Brooks Glycerin is understandably many runners’ daily trainer of choice. But can the Glycerin model work for speed sessions, long runs, and everything in between? Let’s explore how the Glycerin performs for different run types.
Recovery Runs
The generous cushioning and durable comfort make the Glycerin an excellent option for recovery runs following hard efforts. The DNA LOFT midsole provides plush softness for tired legs without being overly unstable.
The GuideRails support also helps keep form in check when fatigue sets in. For easy paced efforts to flush out hard workouts, the Glycerin helps you bounce back.
Long Runs
With its consistent cushioning and smooth transitions, the Glycerin shines for long training runs targeting double digit miles. The full ground contact outsole evenly distributes impact to avoid hotspots over long distances.
The removable OrthoLite insole wicks moisture and resists packing out too quickly through later miles. The Glycerin provides the comfortable reliability long run days demand.
Tempo Runs
While not the fastest shoe, the Glycerin can pick up the pace when needed. The extended Caterpillar Crash Pad in the heel ensures a smooth rocker transition as you roll through your footstrike.
The flexible forefoot and breathable upper adapts well during faster paces. For anything from marathon pace down to 10K-focused tempo efforts, the Glycerin holds up.
Speedwork
Dedicated speed shoes are better suited for pure track workouts. But the Glycerin provides enough response for the occasional interval session or progression run blending paces.
The DNA LOFT foam drops weight from previous versions, keeping the ride nimble enough for speed. A touch of added forefoot flex allows sufficient leverage for faster turnover.
Trail and Off-Road
This versatile neutral trainer isn’t just for roads. The Glycerin’s outsole configuration grips dirt, packed gravel, and groomed trails securely. Increased lugs and rubber in high wear areas enhance durability.
The ample cushioning tames rocks and roots with ease. Just beware of muddy and loose terrain that might allow slippage in the rounded heel.
Treadmill Running
Many shoes feel flat and lifeless indoors, but not the Glycerin. The GuideRails support frame maintains stability on a moving treadmill belt. Consistent heel to toe cushioning keeps feet happier for longer indoor miles.
The shock absorbing capacity smooths the repetitive footstrike on unchanging gym surfaces. The Glycerin brings versatile cushion for any indoor run.
While specialized shoes exist for certain run types, the Glycerin models offer enough performance to handle a wide range of paces, distances, and environments. Cushioned and comfortable with just enough speed, it’s a superb do-it-all neutral trainer.
Maintenance And Care Of Glycerin Running Shoes
The Brooks Glycerin running shoe is known for its plush cushioning and smooth, comfortable ride. With proper maintenance and care, you can extend the life of your Glycerins to keep enjoying hassle-free miles.
Follow these key tips for cleaning, storing, and caring for your Glycerin shoes.
1. Remove Debris
Check the outsoles and remove any embedded rocks or debris after each run. Pebbles lodged in the sole’s grooves can scratch indoor floors or lead to discomfort when running if not removed.
Give the upper mesh a quick visual inspection for splashed mud or dirt, brushing off any dried clumps with a cleaning brush or towel.
2. Wash Regularly
Every couple of weeks, do a deeper clean by washing your Glycerins. Use a small amount of gentle detergent diluted in water. Avoid harsh household cleaners.
Scrub the outsole and midsole with a brush to lift stains. Then clean the upper with a rag or soft brush, being careful not to oversaturate the mesh.
3. Air Dry Thoroughly
After washing, stuff shoes with newspaper or towels to absorb excess moisture and help them hold shape as they dry. Allow 24-48 hours of complete air drying time before wearing again.
Don’t dry in direct sunlight or use heat like a hairdryer, which can damage the mesh or foam.
4. Disinfect Regularly
Since sweat and bacteria accumulate in running shoes, disinfect them occasionally. Mix a solution of one part white vinegar to four parts water in a spray bottle.
Lightly spray vineagar solution on all interior surfaces of your Glycerins, let sit 10 minutes, then allow to fully air dry.
5. Use Odor Sprays Cautiously
Freshening sprays can help reduce shoe odors but some ingredients may degrade foam or adhesives over time. Use odor sprays sparingly and only on shoe interiors, avoiding direct contact with foam or fabric surfaces.
6. Replace Insoles
The Glycerin’s removable insoles lose cushioning over time. Replace insoles every 300-400 miles or 6 months to refresh underfoot comfort.
Aftermarket insoles provide customized support, but ensure they don’t compromise the shoe’s fit or stride feel.
7. Check Midsole Wear
Look for excessive creasing, compressed spots, or changes in midsole density when cleaning shoes. These signs indicate the Super DNA and GuideRails foams need replacing.
Average Glycerin lifespan is 300-500 miles but varies based on runner’s weight and running surfaces. Earlier replacement may be needed if midsole wear is pronounced.
8. Let Foam Recover
Unlike running in old, packed out shoes daily, rotating different pairs gives midsole foam time to rebound. Use your Glycerins every other day or every few days to prolong cushioning.
Also avoid storing shoes under compression like upright in a closet. Laying flat or on side allows foam to decompress when not being worn.
9. Store Properly
Keep your Glycerins out of direct sunlight and away from heat sources when storing. Avoid excess moisture which can break down adhesives.
Stuffing shoes lightly helps them hold shape. Alternate right and left shoe orientation rather than stacking pairs identically.
With regular cleaning, rotation, replacement, and proper storage, your Glycerins will deliver reliable comfort and response far beyond that first release day out of the box.
Maximizing Durability And Lifespan Of Glycerin
With proper care and maintenance, the Brooks Glycerin running shoe can log hundreds of blissful miles. But even this well-constructed neutral trainer will eventually wear out. Follow these tips to maximize Glycerin durability and lifespan.
Rotate Shoes
One of the easiest ways to safeguard longevity is to rotate your Glycerins with other running shoes. Alternating different models varies the stress on your feet, ankles, and legs while giving foam time to rebound.
Aim for at least 2-3 shoes in your rotation and limit wears of each to every 3rd or 4th run. Shoes used daily wear out much faster.
Inspect Bottoms
The Glycerin’s outsole rubber and exposed midsole foam are common wear areas. Inspect the bottom tread regularly, looking for thinning material or changes in the heel crash pad density.
Outsole durability varies based on runner’s weight and running surfaces. Expect to replace sooner if running primarily on abrasive roads.
Watch for Collar/Liner Damage
The Glycerin’s inner bootie liner and padded tongue/ankle collar see a lot of motion. Tiny tears or holes in these fabric elements indicate materials are breaking down.
Seam failures or loose stitching around the eyelets is another red flag. Address issues early before they compromise structure or moisture protection.
Note Midsole Changes
The Glycerin’s Super DNA midsole foam will compress and crease over time. But excessive flattening or indents forming early on signal durability problems.
Also note any yellowing or hardening of the exposed midsole areas under the forefoot flex grooves, which can indicate oxidization.
Vary Surfaces
Going for a trail run or hitting the treadmill once a week increases longevity versus pounding the same roads and sidewalks over and over.
Varying terrain challenges your footstrike and puts varied forces through the foam, improving recovery and durability.
Use Aftermarket Insoles
Replacing the Glycerin’s factory insoles around 300 miles can refresh interior comfort and support. Aftermarket options like Superfeet better resist compression.
Just be sure any added insole doesn’t compromise shoe volume or squeeze your foot once inside.
Re-Lace Occasionally
Changing up your lacing pattern once a month distributes pressure to different areas and reduces excess strain.
Try heel lock and alternate lace techniques to relieve hotspots or irritation.
Address Problems Early
At first signs of undue wear, address it. Use Shoe Goo or similar compounds to patch small holes and tears before they spread. Super glue can temporarily repair separated outsole sections.
Getting more miles out of your Glycerins requires diligent inspection, care, and maintenance. But with some attentiveness, you can enjoy buttery smooth cushioning to the very last step.
Reviews Of Top Glycerin Shoes For Women
With so many Brooks Glycerin models to choose from, it helps to hear directly from women who have taken them for a run. Here are reviews of some top-rated Glycerin shoes to help you find your perfect pair.
Brooks Glycerin 19
“The Glycerin 19 is my new favorite daily trainer! I have narrow heels and wide toes, and these fit me perfectly with no slippage. The plush DNA LOFT cushioning absorbs impact without feeling mushy. The flex grooves in the outsole make my heel to toe transitions smooth as butter. I love the eye-catching speckled midsole and translucent printed overlays that give these a modern look. For high mileage comfort, I’d choose the Glycerin 19 again and again.”
Brooks Glycerin GTS 19
“As an overpronator, I rely on the GuideRails support in the Glycerin GTS models to keep me stable. This updated version doesn’t disappoint! The DNA LOFT cushioning provides softness without losing responsiveness. The structured mesh upper cradles my foot securely. The GuideRails keep me moving efficiently even as I start to fatigue on longer runs. For a plush shoe with support, the GTS 19 is a winner.”
Brooks Glycerin 18
“I’ve bought every Glycerin model since the 15 and have enjoyed them all! The 18 has a roomier toe box than previous versions which gives my toes more wiggle room. They fixed some of the midfoot stiffness from the 17. This remains my go-to shoe for half and full marathons. I don’t feel beat up at all after long runs in these – the perfect blend of cushioning and protection.”
Brooks Glycerin 17
“The Glycerin has been my shoe of choice for years during marathon training. The 17 didn’t disappoint! It has a smooth, cushioned ride from heel strike through toe off. The upper is so breathable my feet stayed cool even on hot runs. I did notice the midfoot fit is snugger than the previous model, but sizing up a half size solved that issue. Overall this is a comfortable, durable daily trainer built to rack up training miles.”
Brooks Glycerin 16
“I typically use a stability shoe due to my flat feet and tendency to overpronate. When I tried on the Glycerin 16, I was amazed at how soft yet supported it felt! This neutral shoe works well for my medium arches thanks to the GuideRails support frame that prevents excess rolling in. The full length DNA LOFT foam provides a responsive, pillowy soft ride. After hundreds of miles, the cushioning still feels lively. For a luxury feel, I’d go Glycerin.”
With outstanding comfort and plush cushioning run after run, it’s easy to see why the Glycerin franchise remains a top choice for so many female runners year after year.
Choosing The Best Glycerin Shoes For You
With the Brooks Glycerin franchise offering so many comfortable options, how do you select the best model for your needs? Consider these key factors when choosing your perfect Glycerin shoe.
Your Arch Type
Runners with medium to high arches can enjoy the plush neutral cushioning of the standard Glycerin. If you tend to overpronate or have flat feet, consider the Glycerin GTS which has built-in GuideRails support.
The GuideRails help control excess motion for smoother transitions. Try models with and without GuideRails to see what feels best.
Your Foot Shape
The Glycerin fits snugger through the midfoot with a rounded toe profile. If you have wide feet or high insteps, consider sizing up a half or full size. The stretch woven upper on some models like the 19 provides more accommodation.
If you wear prescription orthotics, ensure the Glycerin models you try on have enough interior room to fit the inserts comfortably.
Your Running Pace
While designed as a daily trainer, the Glycerin has enough responsiveness for varied paces. The DNA LOFT cushioning ensures the shoe doesn’t feel sluggish when you pick up speed.
Heel-strikers may prefer the additional gel units found in some models like the 18 and 19. Forefoot strikers will appreciate the enhanced flexibility.
Your Mileage
The Glycerin consistently ranks among runners’ favorite shoes for high weekly mileage and long training runs. The durable cushioning maintains comfort over hundreds of miles.
Rotation is still encouraged rather than running in Glycerins daily. Light and low mileage runners may find alternatives that meet their needs.
Overall Comfort Needs
If you prioritize cloud-like cushioning and running happiness over ground feel and performance metrics, the Glycerin delivers. The plush ride makes them popular with runners who want comfort over miles.
Some racing flats may offer a more responsive, faster feel but sacrifice cushy comfort by comparison.
Terrain You’ll Run
While designed as a road shoe, the Glycerin can tackle light trails, treadmills, and pack dirt. Deep lugged trail shoes perform better on sloppy terrain.
The consistent cushioning smooths out any surface for a comfortable run. Just note traction limits on slippery ground.
Your Budget
The Glycerin models retail for $150 USD, but can be found on sale online and at running stores for under $100 at times. Less frequent runners may find cheaper alternatives suffice.
For heavy trainers logging 40+ miles weekly, the Glycerin is a durable value given the hundreds of miles it lasts.
Considering these factors will ensure you select the ideal Glycerin for your training needs and keep you running happily for miles and miles.