I have yet to try a truly "invisible" deodorant, anti-perspirant, or any combo of these. They may go on clear but once you try to remove a black dress and the skirt touches your armpit, there will be a white mark. Same if you're wearing a black shirt, sweat, and then the sweat dries...you will see a white outline of where the sweat was. I have tried Secret, Secret Clinical, Degree Clinical, Arid XX, Dove...you name it, and it's true for ALL of them. A lot of them said they were clear or invisible, and a mark was still left. I'd rather have marks than a lingering case of offensive b.o. though.