Design: NDure upper technology designed for superior durability Durable toe guard Breathable mesh upper ensures comfortable wear In-Shoe Comfort: FuelCell foam delivers a propulsive feel to help drive you forward Durability & Traction: Non-marking NDurance rubber outsole technology provides superior durability in high-wear areas to help get more out of the shoes Additional Details: Weight: 405.15 grams (14.3 oz)