This tall sock is made from a mix of materials including merino wool, gaining the benefits of insulation without increasing overall bulk. The full height will cover your calfs, making it perfect under all kinds of footwear and on every adventure. These socks are made of 41% Polyamide, 28% Wool, 28% Polyacrylic and 3 % Elastane (Lyrica). Care: Do not dry clean, do not iron, do not tumble dry and do not bleach. OK to machine wash cold. Sizes may be smaller than expected.