The SEALSKINZ Runton, featuring Hydrostop, is a mid-length sock designed for a range of cold weather activities such as hiking, trekking, and mountain biking. Its waterproof and breathable qualities make it an essential accessory for outdoor enthusiasts. The Hydrostop barrier effectively prevents water from entering, ensuring feet stay dry and comfortable. Comprising a robust outer layer of 90% Nylon and 10% Elastane, the Runton sock is built for the colder months. Its middle layer includes the AQUASEALZ waterproof membrane, while the inner layer blends 35% Merino Wool with other materials for warmth and moisture-wicking. Suitable for all cold weather conditions, it's a versatile addition to any outdoor wardrobe. Stay dry, warm, and comfortable in these original 100% waterproof, windproof, and breathable mid length sock. Crafted with fine Merino Wool, it insulates and regulates temperature for colder weather use. The 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, these 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. Caring for your socks is hassle-free. Simply wash at 40ºC/105ºF, low tumble dry or drip dry. No need for special detergents, line drying, or re-waterproofing. 100% waterproof, windproof & 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. Durable and long-lasting. Hassle-free washing and drying instructions.