The smell of sweat is something we happily avoid, but the body produces sweat every day. Most sweat comes out of the armpits and that is why we use deodorants just there. A good deodorant spray will counteract odor and last all day. To have your deodorant in the form of spray is an easy way to apply it. It dries faster than liquid deodorant in a roll-on. Another advantage is that you can more easily use the spray on other parts of the body.