The Dexshell fully waterproof socks, the waterproof and thermal insulation Thermolite Pro specification socks "DS634," are high-quality, professional-specification socks with a length from heel to cuff of 23.5cm to 28cm, reaching the upper calf or just below the knee. The color is tangelo red for the cuff, heel, and toe. These thermal insulation socks use warm and breathable merino wool and have water-repellent and anti-static properties. Compared to other fibers, they excel in water repellency, quickly absorbing and evaporating sweat. They respond to changes in body temperature, releasing heat when the body gets hot and providing insulation when it gets cold. They are ideal for use in ultra-low temperature environments such as ice fishing and winter hunting. Fabric type: Outer: Nylon 97%, Polyurethane 3% Interlining: Polyurethane 100% (porelle membrane) Inner: Merino Wool 40%, Acrylic 40%, Nylon 17%, Polyurethane 3% Special feature: Thermal insulation Description DexShell products use a three-layer construction that sandwiches the waterproof and breathable, stretchable porelle membrane between a durable outer layer and a comfortable inner layer. Waterproof and breathable three-layer socks. - Brand: DexShell - Model name: HYTHERM PRO SOCKS - Size: M - Features: Waterproof, Breathable, 4-way stretch - Construction: Three-layer New and unused. Thank you for viewing.