These slipper socks feature a luxurious extra thick warmth, with alpaca figures woven into the body of the socks. They’re made in the USA, from North American alpaca fiber (63% Alpaca, 25% Nylon, 11% Acrylic,1% Spandex) & have extra reinforcement on the toes & soles for added durability. These slipper socks are sure to keep your feet warm & cozy! Machine-washable. In sizes M (Women’s Shoe Size 8-10, Men’s 7-9) & L (Women’s 10-12, Men’s 9-11).