The Crystal Stick is made of natural mineral salts and is completely free of chemicals, perfumes, and dyes. You simply wet the stick (or use on wet arm pits after shower) and rub on the arm pits just like you would any regular deodorant. You can also use it on smelly feet!
Of course, after swimming, you would need to re-apply, whereas a regular deodorant would hang on after swimming. If you've always wondered about this product, now you know! Try it...it will save you money! One stick lasts approximately one year.