Posturepedic AlignSupport™ springs work alongside layers of foam to make a perfectly medium-firm mattress. This innovative spring design responds to your body weight to provide support where you need it most. Multiple layers of foam are stacked soft to firm for ultimate pressure relief. Moulding to the contours of your body while you sleep.The innovative Memory Sense™ Comfort Core™ has earned this mattress the approval of the Orthopaedic Advisory Board UK. Hand made in the UK and fully recyclable at the end of its use. 7 Year Guarantee. Free Next Day Delivery.