Mattress topper: Get a reflex or memory foam mattress topper! How to use: Simply place on top of any mattress to help improve comfort. Construction: 5cm deep with a 100% polyurethane core and zipped polyester cover. Portable: Lightweight and portable; take it with you! Size: Choose from single, double or king sizes. | Reflex or Memory Foam Mattress Topper | Wowcher