Brooks Glycerin 21
The Brooks Glycerin 21 is a highly cushioned, every day running shoe with soft and adaptive cushioning, ready to handle any distance on the roads.
All Women's Road Shoes
-
Daily TrainersDaily Trainers
As the broad base of the running shoe pyramid, daily trainers are the definition of a go-to running shoe. They prioritize dependable comfort, support, durability, and routine versatility. They're a staple in every runner's closet. If you're newer to running shoes, you can confidently start your journey here.
-
Performance TrainersPerformance Trainers
Performance trainers (or "super trainers") blend elements of daily trainers and super shoes, often giving you the benefits of advanced foams and plates, but adapted for daily training. They make fast runs faster and long runs easier. Highly versatile, many are also great choices as accessible racing shoes.
-
Race Super ShoesRace Super Shoes
The pinnacle of the pyramid, super shoes are the fastest running shoes you can buy. They're designed to race your absolute best and are the apex of running shoe technology and innovation. Often built with carbon-fiber plates and cutting-edge superfoams for the highest energy return, they're made for ultimate racing speed.
Women's Running Shoes by Surface
-
Roads & PavementRoads & Pavement
Road running shoes feature smooth outsoles that are designed for running on paved surfaces such as roads, sidewalks, and bike paths.
-
Smooth Trails & FireroadsSmooth Trails & Fireroads
Designed to handle most trail runs, these shoes prioritize comfort and a smooth ride. These shoes are great for anything from smooth singletrack, park trails, and fireroads making them ideal for those who run from their doorstep on streets before hitting the trail.
-
Rocky & Technical TrailsRocky & Technical Trails
These shoes are best used for hard, rugged trails such as shale, granite or sandstone where grip on smooth surfaces and underfoot protection are important.
-
Soft & Muddy TrailsSoft & Muddy Trails
Designed for use in muddy, soggy conditions, these shoes feature very aggressive outsoles that dig deep into soft ground for exceptional traction.
-
Snowy & Icy TrailsSnowy & Icy Trails
These shoes feature technical outsoles designed to grip snowy and icy trails making them ideal for winter trail running.
Stability Level
-
Neutral Running Shoes
Neutral shoes support the foot through a normal range of arch collapse and generally do not have built-in technology to correct movement.
-
Stability Running Shoes
Stability shoes are a great option for those who overpronate or need added support. These shoes help to limit the inward rolling motion of the ankle while running or walking and assist in guiding the foot straight through the gait cycle.
Product Highlights:
With even more nitro-infused foam than before, the Brooks Glycerin 21 returns to deliver an ultra-comfortable and smooth ride for any distance.
In this update, the Glycerin 21 adds 2mm more plush and responsive DNA Loft v3 foam into the midsole, offering a little extra softness to a shoe that's already plenty soft. As a cherry on top, the additional cushioning does not come at the expense of extra weight. On the contrary, the Glycerin 21 weighs almost an ounce less than the previous model!
Bringing long-lasting traction to the party is the new RoadTack rubber that is strategically placed in the outsole to deliver the grip needed to rack up the miles. This shoe is rounded out with a new engineered warp knit upper that checks the boxes of being accommodating, secure, and breathable, which only adds to the supreme comfort the Glycerin brings to the table.
Running farther has been made easier than ever thanks to the Brooks Glycerin 21––all you have to do is enjoy the ride.
What You’ll Love
- Nitrogen-infused DNA Loft v3 is soft yet bouncy
- New engineered warp knit upper is secure and breathable
- Stable underfoot with widened midsole and outsole platform
Model Number: 1204081B090
Specs & FitLearn More
Shoe Specs (Women's Size 8)
| Weight | 8.8 oz 249 grams |
| Heel Stack | 38 mm |
| Forefoot Stack | 28 mm |
| Heel-Toe Offset: | 10 mm |
How We Measure Our Shoe Specs
-
We measure every shoe in-house to provide accurate and consistent details.
-
Weight
Weight is measured per single shoe, including laces. Men's and unisex styles are based on a men's size 9, and women's styles are based on a women's size 8.
-
Heel Stack
The heel stack refers to how high your heel sits above the ground when wearing shoes. Based on Men's size 9 as the standard.
-
Forefoot Stack
Forefoot stack refers to how high the ball of the foot sits above the ground when wearing shoes. Based on Men's size 9 as the standard.
-
Heel-toe Offset
Heel-toe offset (drop) is the difference in height between the heel stack and the forefoot stack. We use the number given to us by the brand.
How We Measure Shoe Fit
-
All measurements are based on Medium width. Note: fit is relative to the "average" running shoe.
-
We partner with SmartLast, a program by Heeluxe, to use advanced shoe-measuring technology, to provide objective measurements for toe box, midfoot, and heel widths as well as overall length.
Stack Height
-
MinimalMinimal
14-18mm. The shoe has a thin midsole that allows for a natural running experience. Racing shoes and minimalist shoes are common here. These shoes offer a feeling of being connected to the road or trail.
-
LowLow
19-23mm. The shoe has a slightly cushioned feel and may feature added cushioning technologies. Performance training shoes and some trail shoes are common here. These offer protection during footstrike but prioritize a lightweight, grounded experience.
-
MediumMedium
24-28mm. These shoes have a stack height that falls near the middle of the spectrum. The shoes in this category are versatile and great for all types of runs and distances.
-
HighHigh
29-34mm. The shoe has a thick midsole and ample cushioning. These shoes are highly protective and absorb more impact than the body.
-
MaximalMaximal
35mm plus. The shoe has an extremely thick midsole and extra cushioning. The focus is on protection and soft foam underfoot with hardly any ground feel.
Technologies
MIDSOLE
- DNA Loft v3 nitrogen-infused foam delivers plush and luxurious cushioning while maintaining responsiveness and durability.
OUTSOLE
- Roadtack Rubber includes recycled silica and is strategically placed throughout the outsole for long-lasting traction.
UPPER
- Engineered Warp Knit provides a secure and comfortable fit.
