The Kozeesleep Backcare Supreme divan bed has an orthopaedic spring unit & good layers of upholstery which are then combined with a hand tufted damask cover. You a sure to feel the benefit of this extra supportive mattress. 8.5" (21cm) deep mattress 12 gauge open coil spring mattress extra firm support reinforced with a 9 gauge steel rod frame woven damask cover hand tufted quilted side wall hypoallergenic fillings Platform top divan base Drawer options are also available