Apparently, there's a lot of fake memory foam out there. . .at least according to other reviews. This is definitely real memory foam. My hand leaves an imprint. . .even with layers of covers over it. I got the twin size for my son's bed because he LOVES Mom and Dad's bed (which has memory foam, also purchased from Overstock). I'm happy to say, it's wonderful. He loves it! There was no smell to speak of when I opened it. I hung it over a railing for the afternoon and let it fluff up. It's nice and thick and the cover just adds to the luxury. You have to pay more for the good stuff. . .but it's better than wasting money on an inferior product. Look no further. . .this is what you want!