Mattress the paris has a handy guest bed stored underneath the main bed this bed easily slides out on castors and due to its sprung mounted base simply lifts up to the height of the original main 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 standard tension only rod edged for longevity of mattress edge to edge support multilayer luxury u