Bloc Osma Alum
Alum, a natural mineral found in Europe and used by the Egyptians more than 4,000 years ago, is a shaving essential for any well-groomed man. Its antiseptic properties calm razor burn and soothe irritations, and help stop bleeding in the event of a nick or cut. Product of France by Laboratories OSMA
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I've had 6 or so other brands of Alum, but Osma is by far the best for price and quality.
Nice and thick works well.