>>647747>foam doesn't insulate shit it's the air trapped inside that does the insulation foam or no foam.No, it’s the foam that provides the insulation (see: your sleeping bag, winter coat, etc.).
A conventional “empty” air mattress acts as a heat sink and will suck the warmth out of your body and into the ground.
Don’t believe me? Go ahead and spend a late fall / winter night sleeping on a conventional air mattress; you’ll discover that you’d have been better off just throwing the sleeping bag on the floor of the tent, after you wake up at 3:00am freezing your ass off…