Backcare Firm. One of the most modestly priced Sealy mattresses. The Posturepaedic spring system it uses is designed to eliminate tossing and turning caused by uncomfortable pressure points. It has a 9 gauge rod edge helping with the structure of the sides, whilst extending the sleeping surface. Polyester fillings provide a soft top for the medium to firm spring unit beneath. 1 year guarantee. And buy this Backcare Firm Was £149.00 Now £129.00.