>>2318298the cheapest closed cell foam pad is the way to go
they are sold everywhere and cost like 15 local currencies
all this aluminium coating bullshit is just that, it's bullshit
just get the thick, long and wide "winter version" of any cheap ol' pad and you're set
and if you're perhaps hanging around a cool lifehack is to slip the foam pad inside of a sleeping bag liner so you have a comfy place to rest and it's not so rough on the skin