I have only worn these twice since I own them, we only had 2 snow storms so far this season but from what I can tell, they are very warm & comfortable. Both times I was out in the snow taking a walk and shoveling while wearing these boots and they really kept my feet warm and were comfortable. They are on the heavy side, though. I guess that means they'll hold up longer? They are also insulated. They fit true to size. A little expensive but definitely a good buy.