4 Pairs Non-Slip Cotton Yoga/Pilates Socks Socks With Grips for Women 90% Cotton, 10% Spandex Non-slip sole for increased balance, control and superior grip. Soft, hygienic protection, anatomical design, easy to put on One size, fits most (EQUIV. SHOE SIZES 5-10, SOCK SIZES 9-11) Machine wash cold gentle cycle. Do not Dry. Lay Flat. Do not iron.