82% THOR¿LON Acrylic, 17% stretch nylon, 1% spandex * Midweight padding in the ball and heel protects 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 * Lightweight padding in arch for support and a more contoured fit * Wash and dry inside out (to fluff up the pads) using liquid fabric softener after each use (to lubricate the fibers for longer life). Liquid fabric softeners critical to receive full benefit of the product design