Silentnight Miracoil Classic Mattress Features:* Miracoil spring system* Posture support* 19cm depth sumptuous layered mattress* 13g Silentnight Miracoil Spring Unit* Quality high loft micro quilting damask* No roll together technology* 5yr Manufacturer Warranty* National Bed Federation approved (NBF) Enjoy the best posture possible while sleeping on the Silentnight Miracoil 3 Classic Mattress which features the unique Miracoil spring system. The mattress consists of one continuous spring that runs from head to toe to distribute weight up and down the mattress. The Miracoil spring system also eliminates roll together so you and your partner can both have the most comfortable night’s sleep without rolling into each other. This firm feel mattress also has extra springs in the center of the mattress creating an extra supportive Posture Zone for where you need it most. Please note, unfortunately, we cannot deliver this item to the Channel Islands. * For health and hygiene reasons, we are unable to offer refunds or exchanges on Mattresses unless they are returned unused and 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-and-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.