Darn Tough Women's Mountaineering Extra Cushion Socks are designed for extreme outdoor activities and mountaineering. These socks are made from a blend of merino wool, nylon, and lycra spandex, providing excellent warmth, durability, and stretch. The merino wool material is soft, moisture-wicking, and odor-resistant, keeping your feet dry, fresh, and comfortable in harsh weather conditions. These socks have an extra cushioning and a reinforced heel and toe, providing maximum comfort and durability. They also have a seamless construction, reducing friction and preventing blisters. Whether you're climbing mountains or trekking through snow-covered terrains, these top-rated wool socks will keep your feet warm, dry, and protected.