Ah, my mistake.Squatch said:Those aren't air mattresses. Those are self inflating pads. They have foam in them which provides insulation. If you read back a bit you'll see I'm currently using 2 REI 3.5" pads. Love pads. Gave up on air mattresses in the 70's!
Air mattresses are big, cheap bags of air. Way more air than your body can heat up. So you spend cold nights. Think those big things at wally world with a lighter powered inflator.
Still, the MSR NeoAir that I use when backpacking is JUST air too, and very warm. Also very high tech!