It's a lot about the base. The 1-2 combination of a supportive mattress and well-built foundation is just what you need for restful sleep. We designed this king foundation to last, with solid wood engineering and a diagonal bar for strength and durability. Smooth nonskid surface holds every style of mattress in place, including hybrid, memory foam and innerspring mattresses. Please note: a king mattress requires two twin foundations (sold separately).