Drysol
"I was one of those people who could not even wear a T-shirt because of excessive underarm sweat. I would wear sweaters all through summer, and the sweat even went through them. It was awful. After the first night of Drysol, boom, not a drop of sweat. Now, about 6 months later, I only need to use it once every couple of weeks. This thing is a miracle product, and well worth the itching of one night before you fall asleep."