Arm & Hammer Moisture Absorber in a 14 oz. Tub is a non-electric dehumidifier that eliminates musty odors caused by damp, humid air. It combines the power of baking soda and calcium chloride crystals to neutralize tough odors and freshens the air. Baking soda prevents unpleasant smells on fabrics and stored possessions, while calcium chloride absorbs excess moisture. This product is ideal for small rooms and areas, keeping them smelling fresh all year round. Use refills TV #170754 & #643379.