Polished potassium alum stone stick with ribbon and protective case. Potassium alum stone is a natural deodorant. It can also be used as an aftershave. Our alum stone is Cosmos Natural certified. To be applied directly to the areas to be treated: armpits, hands and feet. It covers the skin with an invisible film of mineral salts preventing the development of bacteria responsible for bad odors. It regulates secretions and neutralizes odors while allowing the skin to breathe. Guaranteed without aluminum hydrochloride and without ammonium. Alum stone does not irritate, stick or leave marks on clothing.