ORIGINAL: maytom
Truthfully, almost any decent boots, as long as your "walking or moving around a lot" will keep you warm. BUT!! When sitting in a deer blind or up in a treestand for hours on end in very cold weather "not" moving around, a insulated pak boot will be your #1 choice.
I am a communications contractor here in Montana who works outdoors all winter. Sometimes I stand for hours with these boots working in pedestals with my feet in snow. I also climb poles with these and am on poles for up to an hour where my feet only move inches.
These boots have proven to be the best for me at work or play
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