On a trip to the Adirondacks, I found myself in more snow than my party was accustomed to on a certain side of one of the mountains. We were post holing all over the place. I say all this to vouch it truly IS waterproof. I have worn these on approximately 10 trips, and wear them any time I'm on my feet for long durations of time. I'm amazed at the support that they offer, and the back issues that I don't have when wearing these shoes. Only issue I have found is sometimes if I don't get the tongues positioned just right they put pressure on the front part of my foot and my foot aches against the pressure. This issue was resolved after working them in completely.