This revolutionary back belt developed by Dr. Ho, a back pain specialist, provides clinical-grade traction and decompression therapy to help relieve lower and upper back pain. Soft, interior tubes inflate with air to expand vertically from 4 1/2" to 7 1/2" to stretch and support lower back muscles, reduce stiffness, improve posture and ease pain. Great for men and women, it fits comfortably under or over clothing. Comes with an easy-to-use air pump and instructional exercise and rehabilitation DVD by Dr. Ho. Polyethylene, polyurethane and cotton. This item can only be shipped to the 48 contiguous United States and cannot ship expedited. Available in: Size A (fits waists 25"-41") or Size B (fits waists 42"-55").