I love the back support of my mattress. We got it online from Sam's website. It is high-density foam and under $200 for a twin.

We bought a mattress for our Murphy Bed from the Original Mattress Company store in Spanish Springs. We’ve received numerous unsolicited compliments from our guests. We bought the cheapest mattress that met the specifications from the manufacturer of the Murphy Bed.

Got this one from Amazon for the guest bedroom:

Vibe Gel Memory Foam 12-Inch Mattress | CertiPUR-US Certified | Bed-in-a-Box.

Everyone says they like it, and it is less than $400 for the king. Our friends that now live here but visited us bought it for their own bed. Wish we would have. Spent double+ on a Nectar mattress and I think I like the Vibe better.

You will have to get rid of your old mattress on your own, and will probably need help getting this on your bed frame.

We prefer our mattress to be extremely firm. We looked locally and could not fine what we liked, that is one a salesman suggested we try Macys in Orlando. When we called, the salesman said I have three that may interest you, and he was correct. We chose the firmest one and have been very satisfied. They had a very good selection.

Have a select comfort. One is #65 and mine is #35. A regular mattress doesn’t work for us.