Follow that hunch for a softer upper and more responsive fit with Altra Intuition 3.0 running shoes. A lightweight and flexible design helps put extra spring in each step. Plenty space in the toe box allows your toes to naturally splay, giving you enhanced stability and making you feel even faster.Upper: Quick-Dry mesh provides breathable flexibility. Flat laces reduce irritation. Padded tongue and heel collar enhance comfort. Midsole: InnerFlex™ grid-like flex grooves in the midsole allow the foot to flex for more speed and better performance. FootShape™ allows toes to relax and spread out naturally and the big toe to remain in a straight position for more speed and stability. Zero Drop™ places the heel and forefoot the same distance from the ground to encourage proper, low-impact form. Abound energy-return compound sits directly under the foot to reduce ground impact and add a spring to each step.Outsole: Foot Pod Technology™ maps the bones and tendons of the foot to let it flex where it naturally wants.