ARM & HAMMER HANGING BAG works in damp, stale humid areas to remove the excess moisture in the air that causes musty odors. It is a non-electric dehumidifier to keep small rooms smelling fresh all year round. Use in clothes closets to eliminate excess moisture that can damage clothes and leather goods and cause mildew spotting and damp feeling fabrics. Arm & Hammer Moisture Absorber & Odor Eliminator works in closets, bathrooms, laundry rooms, mud rooms, basements, crawl spaces, storage rooms, boats, RV's and anywhere stale musty odors are a problem.