What I plan on doing as "my system", is buy one of
these and wear a
Spec Ops Recon Wrap under it...
There are even
imitation recon wraps for paint ball, that are probably just as good.
With the mossy oak hood, it has a cinch strap you can tighten to keep your forehead and ears warm and the wrap will keep the frost off your face as it is highly breathable yet is made of nylon which is a form of plastic (like a thin polypro of sorts) so it retains heat well too, and if for some reason frost or what not forms on the inside, you can easily pull it down under your chin, which will be an additional thickness of layering to keep your jugular veins warm, aiding in your core temp comfort zone.
Hoped that helped.