FOMI's Cushion (19" x 17") and Firm High Chair Back Support (23" x 17") Combo is the ultimate cushion with unparalleled comfort and support of your full back and buttocks. It brilliantly uses the combination of different medical grade materials for each part of the cushion for customized support and comfort for each body part. The unique adjustable gel back support truly caters to anyone’s back pain. Its back support can be moved up or down or removed all together making ti the perfect cushion for multiple users. The back cushion is made of high-density foam topped by gel making it comfortable for all day use. It has upper, middle, and back memory foam sections to provide support for your full back. Each of these foam sections conform to natural body curvatures, supporting the natural curve of your spine, resulting in a healthy back with prime posture. Its firm support helps keep your spine in a neutral position and properly aligns your neck, shoulders and lumbar vertebrae, liberating you from upper and lower back pain. The seat cushion portion is made from gel material, maintaining the same support for all day sitting or driving seat. Made with advanced column-buckling technology, it disperses your body weight evenly, eliminating pressure on the uncomfortable pressure points. This unique gel cooling structure also increases air circulation to keep your bottom cool. FOMI’s Cushion Back Support Combo has non-slip friction on the bottom and back surface to help keep it in place. Its adjustable, 3-way straps ensure it fits any chair and doesn’t move. It’s the perfect choice for your home, car, office, wheelchair, plane etc. Its 3D polyester cover is water and spill proof for easy maintenance. Simply wipe down to clean the cushion and enjoy its comfort and therapeutic effects each and every day.