Salt of the Earth's crystal deodorant was the first product to be offered by Salt of the Earth in 1993. It is a stick of pure potassium alum, a natural mineral salt that has been used as a deodorant for hundreds of years. It works by leaving an invisible layer of mineral salt on the skin to inhibit the growth of odour causing bacteria. The deodorants offer long-lasting protection from body odour with minimal impact on the environment. To use: The natural crystal comes in an easy to handle shape, just take it out of its box to use. Apply to damp skin after washing. To use on dry skin, wet first and then apply. Dry crystal thoroughly before placing back in the box to increase its lifespan. Alternatively store in a clean, dry place. Caution: May mark some household surfaces, marble and natural stone. 100% natural, just one ingredient Completely plastic-free Packed in a simple cardboard box 75g Vegan-friendly Cruelty-free Long-lasting: Light use - 2 swipes per armpit per day, lasts c18 months Average use - 3 swipes per armpit per day, lasts c10 months Heavy use - 4 swipes per armpit, twice a day, lasts c2.5 months Established for over 25 years, Salt of the Earth is one of the leading manufacturers of 100% natural deodorant. Acquired by mother and son team Sally and Thomas in 2005, it was originally run from a backroom in the family home. Since then, the range has developed from the original crystal stick to include spray deodorants, roll on deodorants and refills. All products are certified as containing 100% natural ingredients, are cruelty free and approved by the Vegetarian and Vegan Societies.