Mattress the duo comfort has a handy guest bed stored underneath the mian bed this bed easily slides out on castors and due to its sprung mounted base simply lifts up to the height of the original bed use as two single beds or push together to form one large bed ideal for a range of guests staying over open coil spring unit with double heat treated springs to retain shape and height available in firm or standard tensions rod edged for longevity edge to edge support multilayer luxury upholste