we bought a foam mattress from www.bedinabox.com at the recommendation of this forum and we love it! We bought the PacBed Original RV Queen, 11" instead of 9" for more firm support and added the gel for coolness. It weighs 86 pounds. They ship it to your house in a box and you remove the old mattress, take the Bed in a Box inside in the box, unbox it, remove the shrink wrap (carefully) and voila! instant bed. Best bed ever!! We don't even have struts on the platform and still can lift the mattress to get into the under bed storage.