Good topic. A few years back at the Denver Sportsmen Show one of the seminars was on winter hunting survival presented by a fellow who teaches a survival course at the USAF Academy. What stood out the most was to pack a good balaclava. I don't know where you can buy a proper one that thick enough. I purchased mine at years ago at the same show and it is about 3X as thick as the ones I have seen at Sportsmen and Cabela's.
