Sealskinz Unisex Waterproof Cold Weather Mid Length Sock Introducing our 100% waterproof, windproof, and breathable mid-length sock, perfect for colder weather. Crafted with a fine Merino Wool inner lining, it insulates and regulates temperature. Our unique hydrophilic membrane pulls moisture away from your skin, keeping you dry and cool. With a Hydrostatic Head of 20,000mm, these socks stay waterproof even in tough conditions. Choose from stylish colors: BlackGrey, Grey, BlackNavy Blue, and GreyRed. Made with premium materials and bonded layers, these socks are highly waterproof and breathable: Outer Layer - 90% Nylon, 10% Elastane; Middle Layer - 100% Hydrophilic Membrane; Inner Layer - 35% Merino Wool, 35% Acrylic, 23% Polyester, 3.5% Nylon, 3.5% Elastane. Machine wash at 40ºC105ºF, low tumble dry or drip dry. No need for special detergents, line drying, or re-waterproofing. Extra Product Details 100% waterproof, windproof and breathable for ultimate protection. - Insulated with fine Merino Wool for temperature regulation. - Unique hydrophilic membrane keeps you dry and cool. - Withstands tough conditions with Hydrostatic Head of 20,000mm. - Premium materials and three-layer construction for durability. - Available in stylish color options. - Easy care - toss in the wash with your gear. - No need to re-waterproof, saving time and effort.