@Harold75 It reminds me of what my daughter once said to me- she was talking to a friend of hers and saying that she reads all these different books that claim that such and such is the cure for all things, then another claims that something else is. She told her friend it was so confusing- how are you supposed to know what to believe and what to do? Her friend, a really down-to-earth gal, said "You just pick one and and do it. If it doesn't make you feel better, then you try the next one."
I think that some people are allergic to latex, no? Maybe better to stay away from latex.
Here's the low-down on foam, which I only know because I'm an upholsterer:
There are 3 different factors when choosing foam- one is the density, one is the firmness and one is the thickness. All are independent of the others.
Density: This refers to the quality of the foam- it's how close the molecules of foam are. A higher density means the foam will spring back into shape after sitting or lying on it. A low density foam will go flat in no time. Higher density foams are more expensive than low density foams.
Firmness: you can have a high density or low density foam in soft, medium, or hard. A firm foam of low density won't hold its shape any better than a soft foam of low density.
Thickness- that's an individual preference. A 4 inch thick quality foam mattress is perfectly comfortable to sleep on, but people are used to seeing thicker mattresses. And fitted bottom sheets are usually made to accommodate thicker (6" or even much thicker) mattresses.
If I were you I wouldn't over-think it. If you go to a reputable foam mattress dealer, they should be able to tell you what their best-selling mattress is, and what sort of life you can expect from it.
