I have a military folding cot, couldn't tell you which one, works great for the kids and suspect you really need to be as skinny as a soldier to fit it. My air mattress is a full size so the wife and I can share, I just get to carry it, that inflates to nearly 4" thick, has an r5 rating and can be made too firm. It uses a bladder system that works quite well and lets me inflate it in about 5-6 minutes with no real effort on my part. Maybe find a better mattress?