My dad always told me that working outside in winter was an exercise in not being cold, not staying warm. If you dress inlayers to where you are not quite cold, then you can move around without sweating, sweat kills in cold weather.
If you dress in layers you can remove or add layers to stay regulated. This is one reason I dress in layers and not heavy for hunting, and carry a tump line of a thick wool blanket on my back. The blanket provides extra security for bivouac if needed.
I appreciate the informative comments within this thread. Living where I do, it's inevitable that I'll have to deal with the cold and everything that comes with it. I'll add my cold injury prevention method to the mix---stay inside, that's what I do.