Icebreaker Merino Ski Over the Calf Socks, New Zealand Merino Wool 60% Merino/37% Nylon/3% Lycra Made in US Achilles instep support preventing slipping Cold weather skiing comfort and protection Strategic medium and heavy cushioning Function junction removes stitching to reduce bulk 60% merino wool, 37% nylon, 3% lycra, sock height: 38cm (15-inch)