All these synthetics are nice, but nothing beats wool. Keeping your head warm is important, so a nice wool hat of some sort is in order. I wear wool socks and wool mits both doubled up if it gets cold, below -20C is cold. First layer for me is always something made from merino wool, then on top of that I can layer heavier woolen sweaters or pants if necessary. An outer layer to keep the wind out is also important, that is where some sort of breathable fabric is usefull - this works for me.