Repose Double Enigma 4ft 6 Orthopaedic Mattress. 12.5 gauge orthopaedic spring unit in a 9 gauge steel frame offering additional support & a firm feel. The soft cotton damask fabric & hypoallergenic fillings also provide luxurious comfort. This 9inch deep mattress has vertical stitched borders & is sculpture quilted. Suitable for a wide range of divan bases & bed frames on our site.