I've bought 2 pair of these shoes. The back of the shoe collapses in incredibly easy. Once it does, there's a piece of cushioning pressuring the back of your heal. I figured the first pair of shoes may have been an anomaly, but it's happening to the second pair already as well, despite my being more careful putting the shoes on. This is not the quality I would expect per the price of this shoe. Once the material is folded down, it is difficult to get it righted. This is a fatal flaw which makes any other positive aspect of the shoe mute.