After several weeks of trying many types of cases I have decided that what I want is a lightweight flexible leather sleeve with an open front, kind of like a driving glove for the iPhone. Anyone seen such a thing? Can be perforated or not, should not have contrasting stitching, must be very thin and light so as not to add weight. Must have open face for using the phone (I'm not interested in taking the phone out of a case to use it). Is such a thing even possible?