Memory foam provides a great sleeping surface. In normal temperatures it is somewhat firm, but when you lay down, it starts reacting to the temperature of your body and begins to mold itself to your shape. Then, weight is evenly distributed along the surface, relieving pressure points and helping you to sleep more without tossing and turning. The innovative Bi-Fold® box spring foundation is for someone wanting the support of a traditional box spring. We the need for easy comfort both during and before sleep. Unfold your Bi-Fold® foundation, lay it upon your bed frame and slide on your chosen mattress, and you are ready for a restorative night"s sleep. 9" High.