Osma Alum Stones are made from a 100% natural crystal. Alum is a well-known astringent mineral which has been used as a cosmetic for more than 2000 years.
The Alum stone will allow you to stop any small cut produced during shaving or close any open pore, which makes it perfect to seal the skin after you shave & Will last you a very long time.
How to use it? Get the alum stone wet and rub it on your face after shaving. Rinse face and pat dry.
The Alum Block comes in a plastic box which makes it ideal when travelling or simply to store it in a hygienic way at home.