Vicks 4100 Humidifier Filters (24 Count) are genuine replacement filters designed for Vicks 1-1/5 gallon impeller-style humidifiers. These filters trap impurities, reduce mineral buildup, and extend humidifier lifespan. By replacing filters every 30 days, you can improve indoor air quality, relieve congestion, maintain optimal humidity, and protect your humidifier, ensuring healthier air and a more comfortable living environment.