Women's Non-Slip Lace Cotton No Show Socks w/Silicone Grips ( Black 3 pack) 60% cotton, 37% nylon, 3% elastane Silicone circle on the inner rim of the socks,non-slip. Silicone dots on the bottom of the foot, non-skid. Lace design & Cotton bottom for more comfortable stretch Womens one size but comfortable fits US size 5.5-9