Design: This special Nike® Pegasus 40 lets you show off all the hard work and training you’ve put in while you rep the Bank of America Chicago Marathon 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 (one 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