Cole Haan Men's 3 Pack Tree Top Crew Sock 69% Pima Cotton/24% Nylon/5% Polyester/1% Spandex/1% Other Fiber Imported Machine Wash Pima Cotton socks are soft and heat-resistant Polyester has excellent was ability and is quick drying Nylon is strong, abrasion resistant, has a soft hand and is quick drying cotton absorbs moisture from the foot, is breathable and provides shock absorbency