I have both the m-edge and Oberon. they are both very good covers and I feel my Kindles are safe in them. the Oberon is thicker with a very rugged leather case. I have tock both of them in my Camelbak and skied with them without worrying. I would almost be willing to step on my Oberon to prove the point, but money is tight at the moment in case my black cloud should reappear