This is the second "firm" in the Select a Firmness beds that I have purchased. As I said in my first review, "firm" is not for everyone but for my back, it is great. I do have an Overstock ECO latex topper UNDER it to give a little more spring. I couldn't stand to put it on the top of the bed because the cover and feel of the bed are just so nice I missed the feel of it when I added a foam topper over it. I cannot say enough about the way the zip on cover and the liner underneath. It is so well made and it keeps the heat down from the foam. I was also pleasantly surprised to find that each bed feels remarkably similar, despite the fact that two foam beds that are the same model and firmness can feel vastly different. All in all I am highly pleased once again.