span data-preserver-spacestrueWith theright baseyour mattress willtake off This Stablesupport Foundation gives your mattress a firm level surface designed to last Adding the Posturepedic Base to your bed setup will elevateyour sleeping experience andcomfort level to a new heightspanstrongPlease note a Cal King mattress requires twobases sold separatelystrongspan data-preserver-spacestruespan