I ordered this mattress in a full size to use on my sons bed. We followed the directions by rolling it out and allowing it to air out for a couple of days before placing it on his bed. It is a bed that does not require a box spring. This mattress is so very comfortable and conforms to your body as you lay on it. It is a firmer mattress than what was on the bed previously. But with the foam it has just the right amount of softness. Another positive to mention is the low odor this mattress had right out of the box! A wonderful mattress indeed!