Product Information DESIGN: Suede material allows for a better fit without irritation Highly tuned single layer mesh creates an inviting fit and feel 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