>>2222849The redpill is that they work but only for what they are designed for. Mylar will simply reflect radiant heat. They do not insulate. If you core body temperature is very low, your are SOL. They work best when used as close as you can get them to your skin without it touching. You need to be ideally using one of these before you are truly cold. They also are a moisture barrier and will facilitate hypothermia when improperly used.
In short, their use is like anything else. Skill and experience beats gear any day. Somebody that carries one of these and does not know it's limitations might be better off without it to "rely" on. Some of the comments in this thread are laughable but typical. Most people will die from exposure in a survival situation and things like this explain why. Oh, and they are not really comfy. No.
t. dumbass boyscout
