Pure Compression Ultimate Warmth Arctic Ski Socks - Heavy Thick Ski Sock - Merino Wool Ultra-Warm: Made of a thick acrylic and wool yarn, the socks are designed to keep your feet warm under the coldest temperatures. Breathable: Using advanced knitting techniques, we created a ski sock that is not only warm, but also breathable to prevent feet from getting too hot. Non-Itch: Even though the socks contain merino wool, they are not itchy and fit comfortably on your feet. The Ultimate Warmth Ski Socks are the most comfortable ski socks you will ever wear. Moisture Wicking: Unlike other ski socks that may trap moisture and sweat, the Pure Athlete Ski Socks are moisture wicking to prevent the build up for perspiration. Also, they help to stay dry if they get exposed to snow. 100% Satisfaction Guarantee: We know these will be the best ski socks you will ever wear. We guarantee it! If not fully satisfied for any reason, simply return the socks back to Amazon within 30 days for a full refund. Made of 60% Acrylic, 26% Wool, 9% Nylon, 5% Spandex.