I bought these Keen's for my daughter's birthday, which was in January.  We live in the Midwest, and since we were frozen under for the duration of the winter, of course she didn't start wearing these until the end of May when she was out of school.  Within only three months of wear, the back part of the Keen's had separated from the interior lining.  The rest of the sandals are in perfect condition.  This was under normal wearing conditions for only three months, both feet are affected.  My daughter wanted these Keen's as she's going to be canoeing down the entire Mississippi River and bought them for that trip, but now I'm glad they gave out before the trip starts in one week's time.  We will be looking at a different brand of sandals as these Keen were far inferior from our expectations.