Solid Socks – These are our original solid alpaca socks and the elastic is knit through out the top portion of the sock. These are excellent socks for anyone with circulation issues. They are considered in our heavy weight collection. 43% Alpaca, 43% Acrylic and 14% elastic. Machine wash cold, Do not bleach, Tumble dry low and do not iron. Sizing is by shoe size and the socks are unisex Medium: 5-9, Large: 10-13 AlpacaArte - your home for warm, soft and comfy alpaca socks!