An orthopaedic mattress with an open coil spring unit & a layer of memory foam.- Open coil spring unit- 12mm memory foam- Polyester- Duo pads- Quilted panel & border- Back support- No turn- Roll up mattress- Vacuum packed- National Bed Federation (NBF) approved Developed by the NBF-approved Sareer team, the Sareer Orthopaedic Memory Matrah Mattress consists of an open coil spring unit & a 12mm layer of memory foam. This mattress features polyester & duo pads on both sides & a quilted panel & border with Memory Fibre. Please note, unfortunately we cannot deliver this item to the Channel Islands.* For health & hygiene reasons, we are unable to offer refunds or exchanges on Mattresses unless they are returned unused & in their original packaging. For more information please see our Easy Returns section. For more information on different mattress types, please visit our Mattress buying guide. [ Click here for more information.] (https://www.dunelm.com/info/buying-guides/mattresses-&-mattress-toppers-buying-guide)[ Click here] (https://www.dunelm.com/infodocs/downloads/ Furniture-Sizing-Guide.pdf) to check out our handy sizing guide to help you find out if you’ll be able to get your new mattress into your home.