Alum Block As An Anti-perspirant, A Natural Deodorant And It Gives Little Stings On The Invisible Nicks Where No Blood Is Present Telling You How Smooth Your Razor, Blade And Soap Combination Have Been. It Doubles As An Effective, Fragrance Neutral, Antiperspirant, When Applied Under Armpits, And Block Lasts For Ages. If You Have Dry Or Sensitive Skin Then We Do Not Recommend Using Alum Blocks As The Minerals Used Are Astringent Which Means That They Draw Moisture Out Of The Skin. The Alum Block Also Has Antiseptic Properties That Not Only Cool And Refresh The Skin After Shaving, But Also Act As A Balm. An Alum Block Is A Crystal-like Stone That Is Moistened With Cold Water And It Can Also Help To Stop Bleeding Of Small Nicks And Cuts.