Also - Susan brings up the sweat thing.

I've broken a sweat in low temps countless times, duck hunting, skiing, running, splitting wood, changing a tire in five degree weather in the woods in the middle of the night, pushing aluminum boats across frozen swamps, etc. and I've never sustained some life ending chill as a result. I have gotten a little chill, and then opened up or removed whatever jacket I'm wearing to let some steam out. I think this is because, as I mentioned, at some point I go inside, be it 5 minutes later or 12 hours later. I also rarely venture out with a cotton base layer, though I have, and it didn't end me, but I expect wicking layers help. I guess the whole sweating and freezing to death thing happens over longer periods? Something I admittedly don't know anything about!

R