A medium tension Duraspring open coil mattress. The unit consists of a 13.5 gauge spring system providing a good level of support with a medium tension. Vertical handles make for easy flipping, turning and transporting. Hand tufts help the fillings stay plump and in place for years to come. The Quattro divan by Airsprung has a softer flexible surface offering comfort and support for a good nights sleep. The base comes as a platform top or sprung edge for extra comfort and is available with many drawer options.Please note: headboard is not included.