Massage has been added to this popular full-length back support. Cushion features 10 zones for proper alignment and support in any chair. The cordless, battery powered massage goes anywhere. The unique shape is so effective because it was inspired by the body's natural posture and designed to fit the curves of your back. It helps relieve stiffness and pain around the low back, legs and tailbone area. The spinal groove keeps pressure off of the spine while the full-size back supports from your shoulder blades to your tailbone. Lightweight and portable design.