I hunt all over in many different temp ranges and some with snow cover. I use unlined leather for warm weather and 400 gram leather for Rocky Mountain hunting where I am walking a lot and always moving. In Vermont I wear rubber 800 gram LaCrosse rubber boots because we often hunt in snow. For real cold weather especially if sitting on a stand...something I don't usually do much of I wear rubber 1200 gram Lacrosse boots. For ice fishing I use 2000 gram Cabelas rubber boots or my Lacrosse Ice Kings.