Sans mattress
I've recently discovered the benefit of sleeping on the floor without a mattress. I'm actually on half inch foam pad - the interlocking floor foam squares, with a foam wedge under my lower legs. The...
Forum Discussion
Tent campers have known the solution for decades, it's called a "self-inflating sleeping pad", available in many sizes and thicknesses from companies like ThermaRest and MegaMat, and many others. The many cellular pockets of air inside insulate you from the cold of the ground, and more conductive air, as typically we sleep (comfortably) without heat during the night in fabric enclosures.
