Experience ultimate comfort and protection with Sealskinz Waterproof Cold Weather Mid Length Socks. These socks feature a three-layer construction for warmth, durability, and complete waterproofing. The Merino wool lining ensures excellent moisture control, insulation, and comfort, making them ideal for a variety of cold weather activities like hiking, trekking, and mountain biking. Designed with Hydrostop technology, they effectively prevent water ingress, keeping your feet dry and comfortable in all conditions. The durable outer layer is made from 90% Nylon and 10% Elastane, providing a great fit and wearability. Easy to care for, simply wash at 40ºC/105ºF and tumble dry on low or drip dry. Avoid dry cleaning, ironing, or bleaching to maintain their waterproof and insulative properties. Please be aware that prolonged use of the Hydrostop barrier may cause minor skin irritation for some individuals; it is recommended to use these socks outdoors only. Features seamless construction with hand-linked flat toe seams, plus elastic support on the ankle, heel, and instep for enhanced comfort and fit.