Dressing in layers is the key to regulating ones body temperature in cold weather conditions. Layers with custom zipper placements and easy-slide fabrics that wick and breathe bring the advantage of performance and mobility.
Correct sizing among layers is important. Next-to-skin base layers wick moisture for comfort while an insulating layer keeps you warm. A slightly larger outer layer, perhaps a more technical or insulated shell, will protect you from the heavy weather and extreme temperatures without sacrificing comfort and fit.