Thai Crystal Deodorant products are 100% natural containing only crystallized natural mineral salts which kill the odor causing bacteria on your body. This product contains no aluminum and does not prevent perspiration, therefore it will not clog pores! The products also contain no harmful chemicals, oils, perfumes or emulsifiers. This products stops body odor at the source by killing the odor causing bacteria, while most commercial deodorants only cover up the odor caused by this bacteria leaving the bacteria to grow on your body! Thai Deodorant products are recommended by both Walter Reed Army Hospital and the Mayo Clinic for patients with dermatitis in addition to post operative cancer patients! The 4.25 oz Thai Crystal Deodorant Stone is a stick shaped crystal formed from the natural mineral salts. This product is great for underarm and foot odors. To use simply wet the crystal stone and generously apply to the underarm area (or apply directly after bathing while body is still damp). Dries immediately and will not harm clothes! The Thai Deodorant Stone last for many months often up to a year or more!