Because I really get huge sweat stains in tight t-shirts for a very short time, despite various deodorants, I have decided for Purax. The application is very easy, a couple of times just before going to bed rolling back and forth and you're done. A short time later, however, it begins to hell to burn and itch. I persevered brave and really had for 5 days no more sweat stains. I have a total of one month Deo ca used 4 times. It keeps sweat free - absolutely. Even in tight t-shirts with absolute no heat concerns. However, the procedure is more than unpleasant. And now I have an axillary an itchy rash, which I attribute to the deodorant, even though I no longer use since 10 days. It remains entirely up to whether it's worth it to stay sweat-free.