This product was mentioned in 2 comments, with an average of 6.00 upvotes
I got this for the futon frame that my roommate and I are using as a couch. It was heavy and definitely took two people to move onto the frame, but 4 out of 4 of the people who've used it before say it's comfier than an air mattress, and I got free shipping on it too. I'd also definitely recommend finding a cover for it, too.
I'd also like to know the name.
I found this on Amazon, $105, but it's not the same one
DHP 6-inch Coil Futon Couch Mattress with CertiPUR-US certified foam, Full Size - Black [link]