My Survivor slipper socks were specially designed by a cancer survivor to keep the patient’s feet warm. The treads on the bottom of these socks enable the wearer to go shoeless without danger of slipping. In a mini crew style, the socks have a reinforced sole for long durability & a terry lining for extra cushioning. An alpaca blend, they are machine-washable. Made in the USA. In women’s sizes S (Shoe Size 4-6.5) & M (7-10).