Polished potassium alum stone in stick with a tape and a 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 letting the skin breathe. Guaranteed without aluminum chlorohydrate and without ammonium.