Thorlos Unisex Thick Padded Running Socks 88% Exclusive THORLON acrylic, 10% nylon, 2% spandex Care instructions: For longer product life, maximum protection and comfort, wash and dry inside out (to fluff up the pads) using liquid fabric softener after each use (to lubricate the fibers for longer life). For optimal benefits, liquid fabric softeners are always recommended. Do Not Bleach. Wash Normal: 105F/40C. Dry Normal Medium. Do Not Dry Clean. Do Not Iron. Style: XJ / Padding Level: Maximum Cushion Key Benefit: Maximum Protection = Maximum Comfort Guarantee - Your feet will feel better or your money back! Proudly MADE in the USA | North Carolina Fiber Contents: 88% Exclusive THORLON acrylic, 10% nylon, 2% spandex