When it comes to your comfort, chime in for the Ashley-Sleep 8-inch mattress. Its memory foam contours to your body delivering amazing support, pressure relief and comfort. The memory foam layer is supported by a 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. Foundation/box spring available, sold separately. Mattress Top: Tight TopRecommended Foundation Type: Box SpringDelivery Method Disclaimer: Foam - Small ParcelProduct Features: Bed in a Box, Hypoallergenic, No Tools AssemblyThickness: 8 InchMattress Type: Mattress Only, Memory FoamMattress Support: PlushDimensions:Twin: 8 inches high x 37 inches wide x 74 inches longFull: 8 inches high x 52 inches wide x 74 inches longQueen: 8 inches high x 59 inches wide x 79 inches longKing: 8 inches high x 75 inches wide x 79 inches longMattress-in-a-Box Information:Arrives tightly packed in convenient portable box or bagRemove from packaging within 72 hours to maximize expansionCan be used the same night it is unwrapped, however allow 48 hours to fully return to its original shapeAfter unwrapping, air for a few hours (vacuum sealing sometimes traps odors)Due to machine-cutting manufacturing processes, there may be slight variances in dimensionsOnce opened this product is non-returnable.