Brooks Glycerin 21 - White - White - Grey Color:White - White - Grey Altra's signature FootShape™ comfort gives

Altra's signature FootShape™ comfort gives your feet more space to sit naturally and is designed to address biological differences in men's and women's feet

Designed and engineered with a plush Fresh Foam platform

Supportive upper hugs the foot for a secure

Quick transitions The arrow-point pattern in the outsole lets your foot move quickly from heel to toe

An articulated BAllistic Rock Shield between the two layers of DNA LOFT v2 foam provides necessary protection without limiting flexibilty needed for smooth transistions

Brooks Glycerin 21 - White - White - Grey Color:White - White - Grey Altra's signature FootShape™ comfort givesFeatures: Supreme softness. Now with more super soft, nitrogen infused DNA LOFT v3 cushioning that is optimized to be lightweight, responsive, and durable for plush comfort. . Improved fit. New, engineered warp knit upper is breathable and allows for a flexible, accommodating fit while staying soft against your foot. Smooth, stable transition. The broad platform stabilizes your foot and promotes smooth heel to toe transitions Whats New : New RoadTack