adidas Performance Men's Response Boost Techfit M Running Shoe 100% Synthetic Imported Synthetic sole Shaft measures approximately 2.38" from arch Heel measures approximately 1.5" Platform measures approximately 1.00" boost's energy-returning properties keep every step charged with an endless supply of light, fast energy techfit upper is engineered for natural, flexible support and a seamless, sock-like fit Polyurethane sockliner for optimized cushioning Partial EVA midsole for lightweight cushioning