Proraso Allum Salt Block is made from pure potassium allum. This is one of the purest salts available. Salt has a natural ability to inhibit the growth of bacteria, making it a simple and effective tool for keeping your face clean and free of ingrown hairs and inflammation after a shave.
When applied to a damp face, microscopic pieces of salt go from the block to your face to inhibit the growth of bacteria after a shave. This keeps your face clean and free from acne or dark pores without the need for any creams or oils.