1. Material: 70% Combed Cotton, 25% Rayon, 5% spandex, Comfortable, Durable and Sturdy. 2. Size: Suitable for US size 5-10, combines plenty of stretch and a snug fit. 3. These are soft, stretchable, breathable, durable socks and will keep your feet comfortable. 4. With Air permeability, sweat absorption, anti friction properties that keep you dry and comfortable whether you are in hot or cold weather. 5. Ideal for outdoor sports, camping, hiking, mountaineering, trekking, trail, running, climbing, skiing, snowboarding and so on.