Alum stone is 100% natural, which can inhibit excessive sweat secretion, last for a long time, inhibit bacteria and reduce odor. The ingredient is a natural mineral salt underground in the volcanic zone. According to the records of the ancient Greek historian "Herodotus,” people have used this antiperspirant deodorant since the Roman era. While preventing odor, it suppresses perspiration and neutralizes alkaline odor components, so it is also very effective in suppressing sweat odor.