Like new, worn just once. ENERGIZED FEEL: Delivers a responsive and springy ride to add extra lift to your stride without compromising support or speed. SUPPORT SYSTEM: Next-generation Guide Rails provide holistic support by guiding your feet into alignment—reducing heel and shin rotation, and keeping excess knee motion in check. RESPONSIVE CUSHIONING: This responsive cushioning provides best-in-class energy return, for a dynamic, springy, responsive ride. Your own energy is conserved, allowing you put more into every stride. SECURE FIT, INCOGNITO COMFORT: The dynamic midfoot wrap makes feet feel secure inside of the highly adaptable Fit Knit upper. The covert wraparound heel collar treats your feet to plush comfort. A sueded heel tab protects your Achilles from irritation.