The Silentnight Miracoil Memory Mattress combines Silentnight's famous Miracoil firm spring systems encapsulated with layers of pure memory foam and a high density foam for the utmost in support and blissful comfort all night long. Silentnight have successfully integrated the revolutionary visco elastic memory foam material with their unique Miracoil spring system. This integration adds the temperature sensitive properties of memory foam providing pressure relief and total body support. The Miracoil mattress features a unique spring system which runs from head to toe, thus distributing weight up and down the mattress instead of across, eliminating roll together and ensuring that each partner gets a comfortable and supportive nights sleep. The Silentnight Miracoil Memory Mattress benefits from a full five year guarantee.