Tested by IvyEverything in this shop went out on a real trip with me before it earned a listing. Wet, cold, dropped, packed out. This one passed.
Cold does not reach you through the air at night. It comes up through the tent floor, out of your hip and shoulder, and no sleeping bag on top of you fixes that. This insulated camping sleeping pad is the layer that stops it, and a 6.8 R-value stops a lot of it.
6.8 R-value keeps the ground from pulling your heat all night, which is exactly why a summer pad leaves you shivering in October.
Four-season rated, so one pad covers spring through winter instead of two.
Horizontal air chambers spread your weight so your hip never bottoms out on what is under the floor.
Quiet fabric that does not crackle every time you roll over.
Rolls down compact to strap on a pack, so the warmth does not cost you the whole load.
Pitch on frozen ground, get in, and let the cold be somebody else's problem.