Design: Neutral support gives you balance, whether you’re a heel or forefoot striker Redesigned midfoot strap provides a more molded fit to the foot, shaped for all sized arches Heel area optimizes the landing space and improves transition and durability An extra flex groove offers a smooth toe-off In-Shoe Comfort: Nike® React technology is a lightweight, durable foam that delivers a comfortable, responsive ride 2 Zoom Air units (1 in the forefoot and the heel) give a bouncy, springy sensation and an energized feel at toe-off Durability & Traction: Waffle-inspired pattern provides traction for the road