"Made from RUBATEX Closed-Cell Neoprene, Men's Collection Spenco? Products offer exceptional shock absorption, cushioning, and energy return. The micro-denier suede top cloth reduces friction and is treated with ULTRA-FRESH to inhibit the growth of odor-causing bacteria on the insole. Spenco? products feel comfortable in men's shoes. 3/4 insoles provide cushioning with extra toe room."