adidas Performance Men's Response 3 M Running Shoe 100% Synthetic/Textile Imported Rubber sole Shaft measures approximately Low-Top" from arch Weight: 12 ounces (size 9); Runner type: stable; Midsole drop: 10 mm (heel: 29.5 mm / forefoot: 19.5 mm) boost's energy-returning properties keep every step charged with an endless supply of light, fast energy STRETCHWEB rubber outsole is lightweight and elastic, adapting to the ground for stability and working strategically to optimize the unique properties of boost from touchdown to push-off Air mesh upper for maximum ventilation Sleek forefoot and S-curve shape; Mid cut offers ankle support; Sock-like construction for a snug fit