The Original McKenzie night roll is designed to compensate for poor sleeping positions by supporting the spinal structures and maintaining proper lumbar posture while sleeping on the side or back. Patients who exhibit symptoms of lumbar syndrome upon waking may perpetuate their problems through involuntary adoption of poor sleeping positions. The Original McKenzie night roll ties easily around the waist, and the exclusive tapered ends allow comfort and freedom of movement without loss of support. The roll features a removable and washable light blue cotton/polyester slipcover. * Maintains support while sleeping on the side or back. * Ties around the waist easily & quickly. * Tapered ends allow the body to move unrestricted. * Washable slip cover included. * Diameter: 13 1/2" * Available in 2 sizes. * Large/Xlarge size (34 1/2"+ waist)This product is not returnable once removed from sealed plastic packaging.