This 8" Sealy foam mattress is for the trundle part of my daybed. I absolutely LOVE it. It is perfect and fits into the drawer section of the Casey Trundle that we also ordered from Overstock.com. Although I have not actually slept on this mattress yet, I laid on it and tested it and it feels SO comfy. I am anxious for our first guest to try it out. As soon as it was unwrapped from the plastic that came in, it took shape. I read from other reviews that it might have a strange smell for 1 hour or so but it did NOT. I am VERY happy with my purchase and would definitely recommend it!!