I have owned both the mid and low version of this shoe. The mid I had to warranty after just one week of hiking. The sole was separating from the upper near the toe and was no longer waterproof. The low is now having the same issue, although I have been wearing them for about a year (just causually, not for hiking). Since I cannot find the reciept and I have had them for about year I am unable to warranty them. I love Keen shoes as they fit my feet better than most brands. I should mention I had the black ones, for both the low and mid, and they seem to be a different material than precious models. Since it is a very similar issue for both it might be the new material that is the issue. Most of my Keen's have lasted much longer than these did.