The Brooks Glycerin 21 combines advanced cushioning technology with nitrogen-infused responsiveness, ideal for marathon runners and long-distance training. The 1104191D420 model delivers exceptional comfort and energy return for high-mileage performance.
**Key Features**
- Nitrogen-infused midsole: Provides lightweight cushioning and dynamic rebound for reduced fatigue.
- DNA LOFT v3 foam: Enhances softness and durability without sacrificing responsiveness.
- Engineered mesh upper: Offers adaptive fit and breathability for all-day comfort.
- Segmented crash pad: Ensures smooth heel-to-toe transitions on varied surfaces.
Size Charts
