WARNING : Before you buy the product make sure the seller name first, which is HTmemoryfoam (if not, don't buy the product, if you buy the product, we are not responsible for the quality of the product that will arrive you, such as an alert ----- Description: Memory Foam Memory Foam Memory Foam Orthopedic Memory Foam Back Pillow with Premium Fabric Washable Cover . USAGE: Medical back pillow provides comfort to the spine of cotton spine, distributing pressure evenly across the vertebrae, prevention of back muscle pain, ideal for office chair, car chair, wheelchair.