Hi! I am changing my bed now and I am thinking about waterbed mattresses https://www.talkaboutsleep.com/best-waterbed-mattress/.
They were so popular in the 60s and 70s. Seems like they would give support and comfort and be non-allergenic. With all the talk about memory foam being so toxic to some, this might be a viable alternative. I used one for awhile in the early 90s and I know they were much improved after the basic model that we had. What do you think?