Incrediwear® Circulation Shorts are made of a therapeutic fabric that dramatically increases blood flow to help reduce pain, swelling and stiffness. Ideal for hip, groin, hamstring and lower back pain. Comfortable and breathable, the stretch fit is discreet under clothing. Can also be worn while you sleep. Nylon/Polyester (Carbon Infused)/Spandex. Machine wash and dry. For women and men.