Unisex socks: good for men and women. Perfect to be used as sleep socks. These socks are thin and highly breathable. Wide comfortable cuff elastic and reinforced toe and heel. Body material: All-natural Linen, no dyes added. Hypoallergenic, environmentally friendly. Linen has high moisture absorbency and does not accumulate static electricity. Linen is 20% stronger than cotton. Machine wash cold.