Not great fit at all. I also returned the Keen Utility shoe. What DOES fall off is the top part of the case. I found a small plastic case to store the receiver in because it is the worst for doing this. thus its not ment for me, but for people that have smaller head and smaller ears. I was really tossed up between this and a used 414XLii, and I think Im going to eventually scoop up the 414 as well. I have and own a lot of Anker products. One shoe too big. The quality is great. I was able to polish it out with substantial time and effort, but it shouldn?t have been rusty to begin with.