【EFFECTIVE ABSORBING】Vacplus dehumidifier bags use Spherical calcium chloride to enlarge the area to absorb quickly. One-way moisture permeable paper absorbs effectively. 500 ml/pack large capacity moisture absorption keep dry for a long time.【VISIBLE EFFECT】The moisture is contained in a little plastic bag at the bottom. What amazing is that you can see the water added day by day, and really see the effectiveness. Vacplus create a dry and comfortable indoor environment.【EASY & SAFE】Vacplus moisture absorber packets provide an easy solution to protecting items and fabrics from excess moisture. By Hanging them up, physical dehumidification gives you a Safe, Green & Energy-saving life.【COMPACT DESIGN 】Vacplus hanging packets are designed to hang in closets and other closed spaces, ideal for us in bathrooms, basements, closets, laundry rooms , refrigerator, RV, ship, etc.【HOW THEY WORK】Calcium chloride particles combine with moisture in the air and once they become completely solidified the particles will dissolve and the solution will flow into water reservoir. Please be patient for the process, it may take some time.