Chime 12 Inch Memory Foam Twin Mattress in a BoxWhen it comes to your comfort chime in for this 12 inch twin memory foam mattress. Its foam contours to your body delivering amazing support pressure relief and comfort. The thick memory foam layer is supported by a super thick layer of firm support foam. Plus this mattress is made of hypoallergenic material keeping dust mites pollen mold and pet dander out. This mattress arrives in a box for easy set up. Foundationbox spring available sold separately.