After over 10 years of buying winter hiking boots with mediocre success, I finally found what I was looking for. This is an Incredible boot, waterproof and warm. I wore these in multiple winter conditions and they exceeded my expectations in every one of them. (I work outdoors in the upper midwest during the winter.) Cold, wind, wet slush, dry snow, blizzards, warm days, mud, they performed perfectly. They are not bulky, they have amazing tread and grip with the Vibram sole and kept my feet DRY, ALL DAY when paired with the proper sock. The only negative thought is that they are a little extra work to get on, with the non-zippered/non-removable inner bootie. However the non-zippered inner bootie is a major plus for keeping your feet dry when walking through the deep snow and slush. I would highly recommend these boots. You get what you pay for!!