The most premium of the new Sealy Ortho range, the Sealy Steeple Ortho Plus Mattress offers luxuriously firm orthopaedic support. PostureTech Core Support springs sit open within the mattress and move autonomously to adapt to the heaviest parts of your body. PowerPack zones give enhanced lumbar care, firmer at the centre of the mattress where you need support most. An EdgeGuard border allows you to sleep or sit right on the edge of your mattress with no sag. Fully recyclable at its end of life. 5 Year Guarantee. Free Next Day Delivery.