This back support was designed to be worn with high activity. The Saunders S'port All Back Support efficiently stays in place while supporting your lower back and sacroiliac joints. The support stays in place during high levels of activity by combining a traditional back support with compression shorts. Adjustable side-pulls allows the user to appropriately apply the desired amount of pressure to the lower back and sacroiliac joints. Compression shorts are made from 3% nylon and 17% spandex for maintaining a cool temperature and ensuring total support. Choose a size, white in color.