70% Coolmax, 27% nylon, 3% spandex * Lightweight, but dense terry padding is added to ball and heel for added protection * Size 10 fits shoe 6-8; size 11 fits 8.5-10; size 12 fits 10.5-11.5; size 14 fits 12-14 * Coolmax construction for moisture transport, excellent blister protection while keeping you comfortably cool * 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