Ideal for travel bags, handbags & gym bags. Salt Of The Earth totally natural crystal deodorant works by leaving a thin layer of natural mineral salts on your skin. These mineral salts are a natural deodorant & inhibit the formation of body odour on your skin. Made purely from Ammonium alum, a natural antibacterial mineral salt that has been used for natural odour protection for hundred of years. Unscented Fragrance-Free