Dream 10 Inch Hybrid Mattress, High Density Foam and Pocket Spring Mattress in a Box, CertiPur-US Certified Foam so comfortable sleeping on clouds love the firmness and the softness of the mattress. I allow 48-72 Hours for Complete Expansion Hybrid Foam and Pocket Spring Queen Mattress in a Box Breathable Knitted Fabric Covering. Dimensions (Overall): 80 inches (L), 60 inches (W).