The Brooks Glycerin 21 combines advanced cushioning technology with nitrogen infusion for superior comfort and energy return, ideal for long-distance running and daily training. The 1203811D020 model delivers a plush ride with responsive support, designed for runners seeking a balance of softness and performance.
**Key Features**
- Nitrogen-infused midsole: Enhances cushioning and durability while reducing weight for a more responsive run.
- Engineered mesh upper: Provides breathability and a secure fit, adapting to foot movement for comfort.
- Segmented crash pad: Absorbs impact and ensures smooth heel-to-toe transitions on various surfaces.
- DNA LOFT cushioning: Offers a soft yet resilient feel, reducing fatigue during extended runs.
Size Charts
