1.Machine Wash.Made from cotton, the toe seams are flat and well-made. They are elastic to fits a wide range of foot sizes perfectly. The fabric is lightweight, breathable, moisture-wicking, and breathable to keep your feet cool.2.Cotton is more durable, and more comfortable and Odor resistant than POLYESTER3.Suitable for many occasions formal & informal Machine Washable,socks to keep feet cool and dry.But Please feel the sock, much more soft and silk like feeling.4.Soft and smooth,premium breathable, skin friendly. Give you a cozy warm feel, they will not want to take it off!5.You could wear these casual socks whether indoors or outdoors. Perfect for sports, school, play, and daily wearing.The good gift for you, your friends.