The Pump-It-Up Back Stretcher is a customized, inflatable back stretcher that loosens muscles, decompresses pressure between spinal column discs, and releases tension in the lower back to let natural lubricating fluid flow freely between joints to prevent stiffness. Curved design promotes spinal balance, flexibility, and a perfect posture. Use laying down or in a chair. Wood, polyester, foam, rubber, 15"L x 10 1/4"W x 2 1/4"H.