86% THOR¿LON Acrylic, 10% stretch nylon, 4% spandex * Midweight padding in heel and ball protects the foot from shear and impact forces * Specifically designed with extra stretch yarn added to conform more precisely to the ankle area. * Custom toe area design; smaller heel pocket for added comfort and improved fit for a woman"s smaller heel * 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