Not sure if the issue was that it was in the high 30's to low 40's, or what, but it didn't hold air very well.  I had a tarp under the tent, and one of those moving company blankets under the mattress itself, but it went pretty flat each night.  I weigh 205, which I think is within the weight rating?  I'd recommend the mattress because it worked adequately, except for the air retention.