Lumbar Support This is a high density, contoured lower back support, and used for therapeutic exercises and rehabilitation workouts. It is designed for maximum lower back support, used on office chairs, home use on sofas and chairs, and is a perfect addition to your car seat, for maximum lower back support while you drive. The Lumbar Support is available in all our in stock fabrics, and is available with a Velcro fastening, or an ABS plastic Side Release Buckle. The foam is our most dense Ultracell Polyurethane foam. This foam is of the highest quality for years of resiliency, strength, and compression. Dimensions of the Lumbar Support are: 41.5 cm. long X 15 cm. wide X 5 cm. thick With all 4 corners and top rounded for extra comfort.