Ultra low sock liner for comfort with your favorite shoes. Bamboo rich to wick moisture to keep feet warm & dry as well as non skid silicone inside heel so socks stay up all day! / Adult Size Medium 9-11 (fits ladies shoe size 5-10) / 80% Bamboo Rayon, 17% Polyester & 3% Spandex / Super Soft & Comfortable / Seamless Toe