●Material: 75% Combed Cotton+15% Wool+10% Rayon ●Size: S: 4-6; M:6-9; L: 9-11 US women shoe size. ●Anti-slip: Four Wave-shaped anti-slip silicon heel grips prevent these socks from sliding down. ●Features: fashionable colors, soft and lightweight design, and exquisite construction. Keeps your feet dry and cool, meet the needs of different occasions with the different color assortment. ●Contact us or amazon customer service if your order is not returnable. We will offer you satisfying solution.Rich Cotton - Soft, Breathable, Wearable, Moisture-wicking and Odor-fighting. Perfectly Matches with Your Sneakers, Boat Shoes, Loafers, and More Long lasting and machine washable .