LumbarMax Lumbar Back Support Cushion Pillow For Car Seat. Relieves Back Pain And Keeps Spine Aligned. By Relieve lower back pain when you're riding in the car with the LumbarMax Memory Foam Cushion. Ergonomically designed to provide excellent support and help relieve lower back pain promoting good posture by providing firm yet comfortable support. Made with Premium Malleable Memory Foam that provides effective recovery for longer support and reacts quickly to provide instant relief and comfort. The LumbarMax support cushion is machine washable and comes with a removable soft Polyester - Rayon cover. NOTE: LumbarMax comes with no strap so it will not impede your vehicle's air bag from deploying in case of impact. The cushion will stay in place safetly without the strap. Product Dimensions Are 18 inches High x 15 inches Wide x 5 inches Thick