Hanes Men`s Ultimate X-Temp&trade; No Show Socks 69% Cotton, 27% Polyester, 2% Natural Latex Rubber, 2% Other Fibers. 69% Cotton 27% Polyester 2% Natural Latex Rubber 2% Other Fibers Socks that take extra steps keep you comfortable! X-Temp technology adapts to temperature environment and activity -- speeding and slowing cooling for ultimate comfort all day More than cool! Famous Hanes sock fit and foot-pampering plus high-tech performance Socks wick moisture away to keep feet dry Comfort toe seam