Finally—an entirely sustainable, roll on, zero waste deodorant! a completely natural product, crystal deodorant is a mineral compound made up of alum and potassium crystals. it works by creating a salt barrier under the arms, thus preventing the growth of bacteria which causes body odour while still allowing the body to breathe and perspire naturally. Why cork? The packaging of this product is made entirely of cork, a renewable and sustainable resource. Each year, cork oak forests absorb up to 14 million tons of CO2. on average, cork oak trees have a lifespan of more than 200 years—that means that cork oaks become massive carbon absorbers, reducing greenhouse gas emissions while also making a significant contribution to the quality of the air we breathe. With every purchase of a cork product, you are helping to ensure that more planting and harvesting of cork oak trees will occur, creating a cycle that is healthy for the environment and our planet.