This 4-pack of DampRid Easy Fill Moisture Absorber Refills is your home improvement solution for fresher cleaner air. This non-electric dehumidifier and musty odor eliminator works by attracting and trapping excess moisture to maintain optimal humidity levels. DampRid works in bathrooms closets laundry rooms or any space where excess moisture is an issue. Use these convenient refills for long-lasting freshness in one space or spread them out between the bathroom laundry room kitchen stored boat or RV. Simply open the moisture absorber container drop the refill bag into the upper tray and replace the lid. Each refill packet lasts up to 60 days depending on temperature and humidity. Keep out of reach of children. Read and follow all label directions.