WARNING:Before you buy the product, please check the seller name first which is (HT Medical) if not, do not buy the product, if you buy we are not responsible for the quality of the product you received, please note --- Description: comfortable medical back rest made of high quality raw material with washable premium fabric outer cover. Usage: medical back rest ergonomically designed to relieve upper, middle and lower back pain and work to achieve a healthy posture and help maintain the natural curvature of the spine.