The Finer Details For the first time in Nike Trail Running, Nike implemented a carbon Flyplate, layered between ZoomX foam and a knit fabric-wrapped midsole, to give you propulsive energy and a springy feel. It helps you stay fresh to continue pushing the limits of speed, whether you're at mile 1 or mile 50. Slimmer and lighter than a traditional outsole, the Vibram exclusive Ultrafly outsole made with Vibram Megagrip has a sticky rubber that works with a chevron lug pattern. They combine to provide grip on both uphill climbs and downhill descents, even in wet weather. This exclusive outsole also features Vibram Litebase and Traction Lug Technologies. The result is a lightweight, durable outsole that gives you great grip wherever your run takes you. A flat bottom and minimized cross rocker give you optimal stability on trail terrain while the heel-to-toe rocker provides a smooth transition. Specifically engineered zones of support in the midfoot give you a secure, yet lightweight feel while weaving through the trail at a rapid pace. Nike Mens ZoomX Ultrafly Trail