This 2-Pair Pack of Men's Ducks Unlimited Tall Outdoor Boot Socks are medium weight to better support you in any climate. These socks have a full cushion leg and foot to absorb shock and give you extra comfort. The soft Merino wool and Acrylic mix keep your feet dry and warm. With an arch support for better fit these sock are perfect for your outdoor needs. Available in Large. Size: Large fits Men's USA shoe size (9-13) Comprised of: 30% Acrylic, 30% UltraSpun Polyester, 20% Wool, 17% Nylon, 3% Spandex.