This is not a dense, sturdy material like you would expect memory foam to be (definitely not $80/worth), and it collapses almost immediately after lying on it. Wayfair was out of the twin size, so I ordered two of the smaller size thinking maybe I could stack them side by side for guests when they sleep over — but it appears that it may be more comfortable if I just stack one on top of the other; of course, that leaves an area so narrow for a guest to sleep on that I might as well just throw the sofa cushions on the floor and say, ”There you go — probably the more comfortable option tonight....”.  This is frustrating because it came shrink wrapped in the mail and obviously  going through the hassle of returning these items to get my money back is moot because that would be more trouble than these are worth.  These may be good for children at some point? (I have no kids, though, and font plan on it).  Save your money.