Thanks so much for the options you've recommended. This really helps.
We'll flip our mattress tonight and see if he has any back pain relief.
Our mattress sits on a slatted platform bed frame.
We put plywood down that's been wrapped in batting for a solid foundation.
The cross slats need to be supported by a beam that runs head to foot up center.
That needs to be support by at least one leg to the floor.
Take a look under the bed. If is has all that, you’re good to go.
Most platform beds have it. A few don’t.
Keeping the upholstery materials clean and dry will extend the life of the mattress.