1. When first opened, the large dry bag absorbs moisture from the air and changes from blue to pink. After 12 months of use, simply place the product in the sun for 35 hours to reactivate its moisture absorption capacity. 2. CONVENIENT MOISTURE INDICATOR: This large dry bag features a moisture indicator that visually signals when it needs to be recharged or replaced. The colorchanging indicator makes it easy to monitor the moisture absorption process and ensure performance. 3. EFFECTIVE MOISTURE CONTROL: Our car dehumidifier is designed to effectively eliminate excess moisture and condensation in your vehicle. Say goodbye to foggy windows, musty odors, and dampness with this car dehumidifier. Its reusable design ensures moisture control. 4. VERSATILE SOLUTION: Our dehumidifier bag not only removes moisture but also purifies the air by eliminating formaldehyde, benzene, and unpleasant odors. It can be used in various environments, such as cars, homes, wardrobes, and shoe cabinets. Keep your car and other enclosed spaces fresh, dry, and odor with our dehumidifier bag.