Champion Women's Performance Crew Socks--12 Pack Bundle (Ch630X2) 81% Cotton, 14% Polyester, 3% Rubber, 2% Other Fibers Made in US Machine Wash Plush cottony yarns wick sweat, keep feet cool and dry Allover knit-in stretch helps assure better fit Built-in arch support soothes your every step Comes in a convenient 12-pack