Kansas Winters aren't anywhere near as bad as your northern snowblows, but I started wearing Underarmor back when I was in high school. I can wear underarmor under sweatpants and cargo pants and a longsleeve t-shirt and light jacket and NEVER be cold in KS. I wear a parka on top when I'm just sitting around in a blind or stand, but as soon as I start moving, I don't need the extra layers.

You also don't sweat (or at least notice that you're sweating) in underarmor. I like to stay HOT, in cottons I get hot,I sweat, get wet, and get cold, in polypropylene, I get hot, I stay hot, and stay comfortable.