Thorlos Unisex LTH Light Hiking Thick Padded Crew Sock 65% Thor-Wick COOL Polyester, 16% Nylon, 14% Thor-Lon Acrylic, 5% Elastic Turn Inside Out-Machine Wash-Use Liquid Fabric Softner 87% Coolmax, 9% Nylon, 3% elastic, 1% polyester Ultra light padding in the heel and ball to protect against shear and impact forces Size 10 fits shoe 6-8; size 11 fits 8.5-10; size 12 fits 10.5-11.5; size 14 fits 12-14 Designed with Coolmax to wick moisture 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