This tennis shoe features propulsive cushioning and lightweight yet durable materials to help you stay on top of your game.NDure upper technology designed for superior durability FuelCell foam delivers a propulsive feel to help drive you forward Flexible, non-marking outsole NDurance rubber outsole technology provides superior durability in high-wear areas to help get more out of the shoes Lace closure 8 mm drop Men's New Balance Fuelcell Tennis 796 V4