Want to stay warm on stand? Add an 850 fill down jacket from Eddie Bauer or LL bean underneath which ever wool you choose. (BTW IMO the "down sweaters" suck.) But that's how my cold bones beat the chill. I wear ALL WOOL most of the time, with the exception of that little weightless wonder of a packable jacket. It weighs nothing and stays dry when layered, and is windproof. I've used and owned KOM, Day 1, Filson, and who knows what else. My favorite is KOM overall. Day 1 is fine, Filson is fine but not really made to shoot a bow with. Virgin wool takes my vote and the "loose" weave makes it breathe, which is nice when you aren't just sitting. In Day 1 I just sweat like crazy if I move around at all. I love my Day 1 vest though.