62% Coolmax, 19% THOR¿LON Acrylic, 14% stretch nylon, 5% spandex * Lightweight padding in the heel and ball protects the foot from shear and impact forces and helps prevent painful blisters * Size 11 fits shoe 5.5-8.5; size 13 fits 9-12.5; size 15 fits 13-15 * Spandex and lightweight padding in arch, ventilation panel for enhanced wicking * 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