Solid Back Insert Wheelchair Cushion 18 x16 x1.25 w Strap Heating Unit Accessories foot 9 x ankle 14 10 LL 100 foot 9 x ankle 14 x rear leg lenght 19 * Soothing Heat and Relaxing Massage * Ergonomic Remote Control with Settings for Heat & Massage * Extra Large to Relieve Multiple Muscle Groups * Velcro straps provide storage and travel convenience * Multifunctional specifically designed to fit a variety of areas on your body SOLID SEAT BACK * 18 W x 16 D x 1 1 2 * Custom and bariatric sizes are available * Used to properly align the body as well as to eliminate the sagging effect found in standard sling seat wheelchair upholstery * Safety straps secure the solid back to the wheelchair * Cushion uses medium density foam and is covered using waterproof black leatherette cover