Cotton 80%. MESH VENTILATION ZONE: Precision knit, breathable fabrics can better wick perspiration, keep feet dry and make outdoor activities easier and more enjoyable.FULLY CUSHIONED: Thickened toes and heels, high density, high elasticity, can ease the impact, reduce friction, effectively protect your feet from the blisters, while providing shock absorption and durability.EXCELLENT ELASTICITY: Elasticized arch brace, good flexibility, to avoid the rotation of the sock during the movement; elastic ribbed cuffs, not tight or loose, durable and comfortable.WIDELY USE: 15 pairs of men's crew socks are high performance socks for hiking, walking, camping, mountaining, skiing, trekking and other outdoor activities or winter sports.