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. Available in: Size A (fits waists 25"-41") or Size B (fits waists 42"-55").