Brooks Glycerin Flex men's Altra Premium material engineered for breathability

Premium material engineered for breathability and comfort

The Smart Calories function provides an estimate of calories burned

Removable spikes

Chest pocket with water-repellent zipper

These shorter running boxers feature seamless construction to eliminate irritation

Brooks Glycerin Flex men's Altra Premium material engineered for breathabilityOWN THE RUN. Be in control of the run like never before in the NEW Glycerin Flex with innovative flexible cushioning working as an extension of the body. The innovative smooth ride offers carefully crafted flexibility, from midfoot to toe off, to feel the best parts of the run and support to go the distance. UPPER New engineered flat knit provides enhanced comfort and breathability thats flexible and moves with your foot. MIDSOLE DNA TUNED with tuned