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. These socks are the epitome of style and fit. Structured and inspired from original climbing socks. With merino wool on the outside to increase heat retention and organic cotton on the inside to give plenty of pile, these socks will give warmth and breathability throughout colder seasons. Size M = 8 to 10 Size L = 10 to 12 Made in Japan 80% cotton, 15% wool, 4% polyester, 1% polyurethane.