Merino wool offers excellent moisture-wicking and anti-odor properties, along with superior heat retention. These City Socks are crafted from pile-knit merino wool, providing extra cushioning and warmth. For added durability and resistance to abrasion, the fabric is knitted using a special technique that encases it in cotton. Additionally, the wool material in these socks is fully machine washable at home. 65% Wool, 20% Cotton, 12% Polyester, 2% Polyurethane, 1% Nylon Size M = Size 8 to 10 Size L = Size 10 to 12 Avoid tumble drying, as it may cause shrinkage. Made in Japan Crafted and designed in Japan. RoToTo uses traditional and modern manufacturing techniques, to create the ultimate cool-comfort sock with the tag line - have a good feel.