Women's 4 Pairs Casual Boot Socks 51% Acrylic, 19% Nylon, 16% Cotton, 12% Polyestor, 2% Spandex Machine wash warm with like colors. Only non-chlorine bleach as needed. Tumble dry low. Do not iron. For best results, turn sock inside out before laundering. 4-Pair Bundle Superior moisture control Soft Cotton Blend Comfort Top