Crafted to be light and fast. Built with FuelCell foam to deliver maximum propulsion and speed with minimal weight. The FuelCell Rebel v4 will be your go-to shoe for any kind of run. FuelCell foam delivers a propulsive feel to help drive you forward Sublimated graphics No-sew overlays 212 grams (7.5 oz) Synthetic/mesh upper FantomFit upper offers ultra-light bonded support Upper features no-sew construction for a sleek fit and feel 6 mm drop; due to variances created during the development and manufacturing processes, all references to 6 mm drop are approximate Lace closure