Tudin Cooling Sports Headbands will stay put while you exercise or participate in your sport. These headbands are made of durable polyester material and wrap around the forehead to keep you cool and dry by keeping sweat & hair out of your face. One size fits most of all heads. Wearing Tudin Cooling Sports Headbands under your hat provides a lightweight and comfortable feeling. Ideal for yoga, gym, basketball and other indoor or outdoor activities.