This 3=pack of Nike Dri-FIT cotton swoosh HBR crew socks feature sweat-wicking Dri-FIT fabric and a reinforced heel for durability and a natural fit. 3-pack; crew length. Dri-FIT cotton fabric wicks sweat to help keep you drier and cooler. Arch support for a secure, snug fit. Reinforced toe and heel for durability. Cotton/nylon/polyester/spandex. Machine washable.