Overview: While I spend a lot of time out-of-doors in inclement weather and sub-freezing temps, my tolerance for the cold just isn't what it used to be. Highly aerobic activities like winter hiking, upland hunting, or stalking big game aren't an issue, but less active pursuits like sitting in a duck blind, chasing whitetail from a tree stand during the late archery hunt, or winter fly fishing on the river can be a different story. And despite investing in some of the top gear