Silentnight Mia 1000 Memory Pillowtop Mattress in Small Double, Double, King and Super King Sizes This delightfully comfortable mattress contains Silentnight’s superior Mirapocket® spring system. A single layer of 1000 springs are individually pocketed so that they react independently as you move throughout the night. This provides pressure relief and zoned support, which are scientifically proven to improve posture. Pocket springs also provide edge-to-edge support which means more sleeping space and optimum spinal alignment. A layer of body moulding memory foam allows free movement during the night, with quick recovery to support your body and provide a soft cocooning comfort for blissful sleep. This non-turn mattress provides a medium firm comfort, meaning it’s great for people who change sleeping positions in the night. Hypoallergenic, simply rotate it head-to-toe every 2 months. Comes with our Silentnight 5 Year Guarantee, for your peace of mind. Assembly: Ready Assembled Depth: 200 CM Height: 26.5 CM Width: 150 CM Firmness: Medium Firm Mirapocket® superior spring system for zoned support 1000 zoned pocket springs for ultimate pressure relief Body moulding memory foam for soft cocooning comfort and support Medium/Firm comfort rating Finished with a quilted sleep surface for ultimate comfort Single Sided, simply rotate head to toe