Originally Posted by DocHolliday
This is what I've never understood about the things. Wouldn't you have to remain the same position all night? And is there really a benefit for those who sleep on their backs? I've wondered if it's even possible to sleep on your stomach on one.
Different people find different things comfortable. For me, I've never had a better sleep than on my memory foam bed. I doubt I'll ever go back to a standard mattress.
FWIW, I sleep on my stomach. I also don't experience the heat issue.
The essential characteristics of memory foam is its viscosity and its density. Because it is viscous, it forms around the body equalizing pressure (much like a water bed). Because it is so dense, movement is slow so you don't get any rolling (like a water bed or a regular mattress for that matter). Hence, the mattress cradles you like a water bed without the motion transfer.
With so many brick and mortar stores carrying these things now, it's easy to try one one. It's sort of a love it or hate it kind of thing. I personally love it.