The Bridgedale Men's Hike Midweight Merino Endurance Boot Sock is designed to ensure dry, warm and comfortable feet. __ With excellent moisture management thanks to overfoot ventilation and carefully considered details including flat toe seams and Thermofit technology.__ Boot length sock for all day protection and next-to-skin comfort. The snug merino wool blend will keep your toes warm in the harshest of weather.__26% New Wool, 18% Merino Wool, 38% Nylon/Polyamide, 17% Endurofil/Polypropylene, 1% Lycra/Elastane