Sealskinz Unisex Waterproof Mid Length Socks for Cold Weather Stay dry, warm, and comfortable in our original 100% waterproof, windproof, and breathable mid length sock. Crafted with fine Merino Wool, it insulates and regulates temperature for colder weather use. Our innovative hydrophilic membrane keeps you dry and cool by repelling moisture at a molecular level. Even in the toughest conditions, the Hydrostatic Head of 20,000mm ensures reliable waterproof protection. Constructed with premium materials, our socks have three bonded layers: Outer Layer: 90% Nylon, 10% Elastane, Middle Layer: 100% Hydrophilic Membrane and Inner Layer: 35% Merino Wool, 35% Acrylic, 23% Polyester, 3.5% Nylon, 3.5% Elastane. Available in 4 color options : BlackGrey, Grey, BlackNavy Blue, and GreyRed. Caring for your socks is hassle-free. Simply 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. Insulated with fine Merino Wool for cold weather use. - Revolutionary hydrophilic membrane keeps you dry and cool. - Triple-layer construction for superior waterproofing and breathability. - Easy care, no need to re-waterproof. - Versatile color options available. - Durable and long-lasting. - Hassle-free washing and drying instructions.