Replacement Filter for Levoit Core 300 Series (fits 300S, P350, 350RF, 300RF) Key benefits Restores purifier performance: replaces a worn filter to bring your Levoit Core 300 series unit back to its intended cleaning capability. Maintains healthier indoor air: traps common airborne particles such as dust, pollen, and pet dander to help reduce allergens and keep air feeling fresher. Simple, reliable swap: designed to install quickly so your air purifier is back to full operation with minimal effort. Compatibility and fit Specifically compatible with Levoit Core 300 series models: 300S, P350, 350RF, and 300RF. Form, fit, and placement are made for the Core 300 filter compartment so the unit maintains proper airflow and performance. Function and performance Captures common airborne particulates to help maintain indoor air quality and support the purifier's designed performance. Performs as a direct replacement to help the air purifier run efficiently and consistently. Practical attributes Designed for Core 300 series dimensions and mounting points to ensure proper sealing and airflow. Manufactured to match the replacement needs of the listed Levoit models for dependable operation. Easy to install — no tools required; simply remove the old filter and insert the replacement. Use scenarios Bedroom: the filter to reduce nighttime allergy triggers from dust and pollen and support better sleep. Home with pets: swap in a fresh filter to better capture pet hair and dander in living areas. Small office or nursery: maintain cleaner air in shared or sensitive spaces where reduced airborne particles matter. Maintenance guidance the filter as needed to maintain performance or follow Levoit's replacement recommendations for your model. Regular filter changes help sustain air quality and prolong the purifier's effectiveness. Compatible models: Levoit 300S, P350, 350RF, 300RF.