Duro-Med RELAX-A BAC insert with strap is the ideal lumbar support to ease lower back pain. It is made of molded, highly-resilient foam. Features an orthopedic design that relieves tension and helps keep sine in proper alignment. The cushion is ideal for travel, home or office use. Included is an attractive, removable and washable cover with convenient straps that help hold the cushion in place. RELAX-A BAC features a composite insert which strengths the cushion.