This Grand Elegance Summit 12 inch hybrid innerspring mattress is the ultimate in luxury. Its design is 7.5 inches tall with individually-wrapped coils that provide perfect support and gentle pressure relief, while the outer row of edge coils are firmer to provide edge-to-edge support and a nice firm seating edge. A layer of 1.5 inches of convoluted foam, a layer of 1.5 inches of cooling GelLux foam, and 1.5 inches of layered cooling air flow gel memory foam that top this Grand Elegance sleep, summit model. Each foam used has been certipur-us certified, having undergone rigorous laboratory testing to surpass standards for flammability, VOCs and overall foam manufacturing processes. Unpack: remove the compressed vacuum-packed mattress from the boxUnroll: carefully cut heavy duty securing straps and allow the mattress to unrollExpand: remove the protective plastic bag and allow the mattress to expandMattress may have a new foam smell initially. This is normal This item requires oversize delivery. Please refer to the Order Summary in the Shipping step at checkout for delivery charge.