Design: Synthetic and mesh upper NDure upper technology designed for superior durability Upper features no-sew construction for a sleek fit and feel Adjustable lace closure for a secure, customized fit In-Shoe Comfort: FuelCell foam delivers a propulsive feel to help drive you forward Durability & Traction: NDurance rubber outsole technology provides superior durability in high-wear areas to help get more out of the shoes Additional Details: Weight: 10.1 oz (287.5g) Drop: 8mm (due to variances created during the development and manufacturing processes, all references to 8 mm drop are approximate)