Stretch and sooth tired sore backs with the SPRI Back/Stretch Relax massager. With an ergonomic design, this massager safely stretches and supports the spine and back muscles. The firm texture provides soothing of deep tissue by stimulating the muscles. Sooth back pain, improve flexibility, and find proper alignment while also reducing soreness by strengthening the abs, oblique's and lower back. See the included exercise guide for instructions.