When using a frame, you can protect the lens well with the lens cap or the protective lens. When the camera uses by default case (40m) and does not want to constantly pack or can even this coverage is very helpful. They also protects the power button. This, however, does not fit in the 60m housing. Since the manufacturer would prefer to attach a cover for the larger housing. The two devices covers (battery and side port) you will not soon, if ever, need.