Made with more supersoft cushioning and updated, breathable uppers, the men's Glycerin 21 road-running shoes offer an improved fit, plush comfort and smooth transitions.
- Updated, engineered warp-knit uppers are breathable and allow for a flexible, accommodating fit while staying soft against your feet
- More supersoft, nitrogen-infused DNA LOFT v3 cushioning than the Glycerin 20, with a +2 mm increased stack height
- DNA LOFT v3 is optimized to be lightweight, responsive and durable for plush comfort
- The broad platform stabilizes your foot and promotes smooth heel-to-toe transitions
- Made with recycled materials equivalent to 5 plastic water bottles
| Best Use | Running |
|---|---|
| Running Shoe Support | Neutral |
| Running Shoe Cushioning | Maximum Cushion |
| Heel-to-Toe Drop (mm) | 10 |
| Heel Stack Height (mm) | 31 |
| Forefoot Stack Height (mm) | 21 |
| Footwear Height | Ankle |
| Footwear Closure | Lace-up |
| Upper | Engineered warp knit |
| Midsole | DNA LOFT v3 |
| Outsole | RoadTack rubber |
| Vegan | Yes |
| Weight (Pair) | 1 lb. 3 oz. |
| Gender | Men's |
Brooks Footwear - Men's
| 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | 14 | 15 | 16 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| U.S. Men's | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | 14 | 15 | 16 |
| U.S. Women's | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | ||||||
| UK | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 13 | 14 | 15 |
| EU | 40 | 40.5 | 41 | 42 | 42.5 | 43 | 44 | 44.5 | 45 | 45.5 | 46 | 46.5 | 47.5 | 48.5 | 49.5 | 50.5 |
Sizing Notes
Sizes along top of chart are U.S. Men's sizes. Correlating U.S. Women's sizes and EU sizes provided for clarity.