Layers is the way to go period. When the temp. gets down to 10 or lower, I will usually have on either first lite wool or uffrotte wool, then a layer of modern synthetic long underwear, my wool bibs from grey wolf woolens, a pair of polyester socks, and one or two pair of wool socks, glove liner then gloves, same on torso with the light layers of insulation, then wool pull over. A first lite wool baclava, over my poly facemask from Predator, Topped with my wool bucket hat. One thing I found years ago, was on the windy days, a windstop pullover (golfers wear), under my outter torso garmet. For the feet I learned long time ago, in Cold weather training, that Mickey Mouse boots are the best, and essential for stand hunting when below zero.