Start with fish net under layer, then merino wool and wool pants and shirt. Fleece layer in addition only for 4wheeling or snow machine, with a wind breaker outer layer.
Heavy jacket in the pack, bibs and over boots for severe cold.
I keep a down vest or jacket in the pack for really cold conditions or if I had to spend the night out (if I were to replace these I would go synthetic). All outer layers are at least one size larger to accommodate up to five total layers.
Heat packs are nice but be sure the clothes are sufficient with out them for unusual conditions.
Still haven't found the ideal glove/mitten solution.
"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli
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