The memory foam mattress was from Amazon. It was Lucid 10 inch gel memory foam rv short queen matress. I will be honest, I had a tough time picking one. I went with this one because it was a little lighter (I am pushing the towing capabilities of my Jeep Grand Cherokee) and it was very highly rated. We went out three times with the stock simons mattress and it was just too hard for my DW. It is in its 24 hour expansion mode now. It seems to be very nice so far although the true test will be in April when we actually sleep on it.