A mattress surface has planar lower and upper surfaces. The mattress has a forward head surface and a rearward foot surface. The mattress has parallel side surfaces. A box spring assembly is provided in a wedge-shaped configuration. The box spring assembly has planar lower and upper surfaces. The box spring assembly has a forward head surface and a rearward foot surface. The box spring assembly has parallel side surfaces. The thickness of the box spring assembly at the forward head surface is greater than thickness of the box spring assembly at the rearward foot surface.