Design: FantomFit upper offers ultra-light bonded support Upper features no-sew construction for a sleek fit and feel Lace closure provides a secure, custom fit Sublimated graphics In-Shoe Comfort: FuelCell foam delivers a propulsive feel to help drive you forward Additional Details: Weight: 168g / 5.9 oz 6mm drop; due to variances created during the development and manufacturing processes, all references to 6mm drop are approximate