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. Balanced Cushioning platform positions your heel and forefoot at an equal distance from the ground, encouraging better alignment and form. Altra EGO foam is designed to harmonize the balance between responsiveness and comfort. MaxTrac outsole provides the perfect combination of grip, traction, and durability on all types of terrain. Quick drying air mesh upper