DampRid Reusable Moisture Absorber with Drop-In Tab attracts and traps excess moisture, eliminating musty odors. Our fastest acting moisture absorber, the 360-degree ventilation system enhances airflow to eliminate excess moisture quickly. Without using electricity, DampRid Drop-In Tablets absorb excess moisture to create and maintain optimal humidity levels wherever moisture is a problem in the home or office. To use, simply insert an unwrapped tablet into the reusable moisture collection units. When the moisture collection reservoir is full and the tablet has dissolved, pour out the liquid and insert a refill tablet (Fresh Scent and Fragrance Free refills sold separately). DampRid moisture absorbers are ideal for use in the bathroom, laundry room, closet, basement, or storage area – anywhere damp, stagnant air is a problem.