Combining memory foam with a 13.5-gauge open coil spring unit, this mattress is a great choice for any bed.- 15mm v 40 density memory foam- 6-gauge rod edge wire frame- 13.5-gauge open coil spring unit- No turn- National Bed Federation (NBF) approved Using a 13.5-gauge open coil spring unit in concert with 15mm of memory foam & a range of other fillings, the Memory Shire Crown 15 Mattress is sure to provide a supremely comfortable night’s sleep.A 6 gauge rob edge wire frame lends additional support & strength while the quilted top finish adds an extra touch of luxury.** Please note: Price is for mattress only.** 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.