The Brooks Glycerin GTS 21 gives you more lightweight cushioning with a touch of stability; all you need for a supportive and comfortable running experience.
- Offset
- 10 mm
- Weight
- 9.8 oz
- Support
- Stability - Stability shoes provide some structure for feet that overpronate (roll inwards) during the gait cycle.
- Cushion
- high

A High-Cushion Trainer Built with Reliable Support
Experience cushioning and support like never before with the Brooks Glycerin GTS 21. This trainer is packed with Brooks’ high-performance DNA LOFT v3 midsole foam, a soft and plush technology that helps absorb the impact of running. The Glycerin 21 GTS also incorporates an innovative GuideRails support system to help keep you comfortably moving forward.
Once you step into the Glycerin GTS 21, you’ll notice a new and improved upper that’s been streamlined to reduce irritation and improve the shoe’s fit. This combined with a broad underfoot platform to ensure a secure transition means your foot will remain stable and every stride feels smooth and soft.
Brooks also makes some of the most sustainable running shoes available. The Brooks Glycerin GTS 21 does not disappoint with the upper being made from 59.7% recycled materials which diverted 4.1 plastic bottles from landfills. Whether using the Brooks Glycerin GTS 21 as a walking shoe, training for a marathon, or anything in between you will appreciate the plush cushioned feel underfoot to keep you moving in comfort.
Features & Benefits:
- DNA LOFT v3 midsole foam is nitrogen-infused, offering a soft, and lightweight experience
- Warp knit upper provides extra breathability and security around the foot
- RoadTrack outsole provides more grip and traction on slick surfaces and rainy days
- The Glycerin GTS 21 has 2 mm more midsole foam than the Glycerin GTS 20 while reducing the overall weight of the shoe
- Weight: 9.8 oz
- Offset: 10 mm (Heel: 28 mm/Forefoot: 18 mm)
Anonymous
Review
After a few weeks, no issues encountered. Size 9 men's, bought size 9.5 for more room, still runs fine. I don't feel the built in support system.
Anonymous
Brooks Men’s Glycerin GTS 21
I am very pleased with the Brooks Men’s Glycerin GTS 21. In particular, the wide sole in the forefoot enhances stability. Also the shoe is roomy in the toe area, making the shoe comfortable to wear. The cushioning provided by the nitrogen loft soles adds a sense of spring to the step. Overall, my experience wearing this shoe has been great
Anonymous
Great Shoes, Love Them!
My fourth pair and I love these. Finished my first half marathon in them 12 days after my 65th birthday!
David Hovey, Jr
Brooks Men's Glycerin GTS 21
Very good, high quality, comfortable shoe!!
Anonymous
His favorite X2!
I bought these for my husband for Christmas. So far of this line of Brooks this is his favorite. He said there’s sthg different about them. Absolutely loves them. He wore them all over Universal with no issues as well. So I ordered a second pair for his bday in Feb!
Kevin Connolly
Great product
It’s been excellent. I utilize these as my daily walking where I am on all different terrain surfaces and for long time periods.
Anonymous
My new Brooks Men’s Glycerin GRS 21
My new shoes are very comfortable and well supported. A former runner, I now walk for exercise. These shoes fit very well and feel great walking a few miles daily.