what's wrong with polyfoam?

Nothing! After reading a lot of stuff online for well over a year I decided to do exactly what that other website said not to do and I bought two pieces of 5 inch thick polyfoam, one med and one firm. Wonderful support, great quality and no one can beat the price. I am in no way connected to the site where I purchased this foam, I found it the same way you can. www.foambymail.com is no secret but it does have the best prices on the net. It's been at least two months since I bought this foam and I can see no change, so far, in it's firmness which is what that other site claimed. I no longer have any hip pain, knees are good, back is GREAT. What a huge difference a firm bed with no bumps can make.