Well there ya go, didn't know that it was what did the job, there must be other stuff that would do the same or similar because I have to wonder if the aluminum was what caused the cyst or if it was the inability to put out sweat while wearing it every day over the whole arm pit. Of course I let the task become a part of my daily routine so there was never a day really that I had none on, No if I am home and could deal with it should I crack a sweat I don't always put it on unless I know I will be doing something that will be sure to need it. I put it on to go out but like I said only on half of the arm pit and so far no cyst, What a relief!