What is a "wristband"?

A wristband is a band of fabric or other material that is worn around the wrist. It is often used as a sweatband during physical activity to absorb sweat and keep it from running down the arm. Wristbands can also be worn as a fashion accessory, with various colors and patterns available to match clothing or represent a particular cause or organization. Some wristbands may feature a pocket for holding small items, such as a key or ID card. They can be made from a variety of materials, including cotton, polyester, nylon, and silicone.