Created by sleep experts, the Emma Smart Hybrid Mattress harnesses the pressure relief of high-tech foam layers and the zero motion transfer of traditional pocket springs in one high-performance design. Product Details Mattress type: Hybrid Pocket Sprung Depth: 21cm Firmness: Medium Fillings: HRX foam with zoned core, adaptive comfort foam, AquaGEL foam and pocket spring core Cover: 99% polyester, 1% elastane Sizes: Super king, king, double, small double, single Requires turning: Yes. Turn from head to foot Features Perfect for those looking for a medium feel mattress with zero motion transfer 100 night sleep trial 10 year guarantee Advanced HRX foam layers ensure excellent pressure relief Adaptive and open-pored AquaGEL offer precise body contouring Pocket spring core ensures zero motion transfer - ideal for couples Fully removable premium cover with handles and washable up to 40C Anti-slip coating on the underside of the mattress