70% Combed Cotton, 27% Polyester, 3% Elastane Imported Machine Wash,Tumble Dry Low,No Ironing. M: Men’s shoe size 7-8.5 / Women’s shoe size 8.5-11 , L: Men’s shoe size 9-13. Non-binding stay-up top for a secure fit.Stretch for Comfort, Better Fit. Wicks away moisture to keep you cool and dry. Reinforced toe and heel provides outstanding durability.