88% THOR·LON Acrylic, 10% stretch nylon, 2% spandex * Extra THORLON provides a maximum fitness density padding for better durability, protection against shock, impact, and shear forces * Size 11 fits shoe 5.5-8.5; size 13 fits 9-12.5; size 15 fits 13-15 * Extended lightweight padding over toe protects toe against fast stops and starts * Machine wash warm or cold with like colors, use non-chlorine bleach only, tumble dry low