Alum stone is a hydrated sulfate of aluminum and potassium. It is a completely natural rock salt. Used as a deodorant, alum stone regulates perspiration by naturally tightening the pores of the skin and not clogged at all. Sweating is only limited without being blocked. In addition, alum stone prevent the growth of bacteria and their fermentation. Bad body odors that are unpleasant are also then naturally eliminated. Alum stone is suitable for all skin types, even the most sensitive and delicate.