I originally did not like these boots because I thought that they were difficult to zip them up and down and uncomfortable. Well, today out of necessity(We have a blizzard), because I did not have any other boots, I decided to try them. To my dismay, I realize that I was completely wrong. They were able to zip up and down with no trouble. In addition, they are water resistant/proof, warm and comfortable. I know this because I walked with them in deep snow. Well done Caterpillar...