83% THOR¿LON, 12% stretch nylon, 5% spandex * Midweight padding in the ball and heel cushions and 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 with added spandex in arch for a more comfortable fit and arch support * 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