A friend recommended this product to me so I thought I would try it. It is said to kill odor causing bacteria and it is surprisingly effective. I should mention that before I purchased this product I went an entire week without deodorant. I took a shower and applied it to my underarms in any areas that I knew for a fact produced bad body odor. Just goes on clear and it isn't mushy. Although it does not look like it would work it does wonders, it is effective for up to 24 hours after first application. Interestingly enough it does not feel like you are applying anything at all. Simply rubbing a clear rock on. I should also mention that it can be used to kill foot odor causing bacteria as well. This is a plus for anybody that has problems with both. Also as someone who is concerned with the amount of toxins and harmful ingredients in many of our most popular health and beauty products I think everyone should also know that this product is made of potassium alum. It is a pure product made without the addition of chemicals, fragrances, oils or alcohol. One of the most important pieces of information is said best on the Thai Crystal web site. http://www.deodorantstones.com/aluminumquestions.ivnu "If an aluminum compound, such as aluminum chlorohydrate or aluminum zirconium, which is very soluble, is used as an antiperspirant, that compound is readily absorbed. Once in the body, the aluminum portion of the molecule ionizes, forming free or radical aluminum (Al+++). This passes freely across cell membranes, and forms a physical plug, that when dissolved is selectively absorbed by the liver, kidney, brain, cartilage and bone marrow. It is this concentration of aluminum that has been the source of concern in the medical community and has prompted the research being done on ALZHEIMER'S DISEASE and BREAST CANCER victims. Potassium alum molecules have a negative ionic charge, making it unable to pass through the cell wall. THEY ARE NOT ABSORBED. This is why our deodorants are safe to use and will not cause high levels of ALUMINUM in your system. ALUM and ALUMINUM are two different substances, with distinct chemical signatures. They possess different chemical properties which create different chemical attributes." I highly recommend this product for any and all people who are concerned with their personal hygiene, health and the effects that aluminum is said to have on our bodies.