【Protect Your Investment】It is highly recommended to use this officially designated replacement filter (Core 600S-RF) to keep your Core 600S air purifier at its best working efficiency and capacity, breathing fresher and cleaner air all the time 【Capture Large Particle】Ultra-fine Nylon Pre-Filter captures large particles such as dust, lint, fibers, hair, and pet fur, also helpful to maximize the filter’s life 【Upgraded HEPASmart Technology】Our HEPA Filter is safer than medical surgical mask materials and can achieve a better purification effect than traditional general HEPA. It captures 99.97% of dust and allergens as small as 0.3 microns such as household dust, pet dander, mold spores and plant pollen 【Eliminate Household Odor】Activated carbon filter abosrbs the unpleasant pet odors in the air and eliminates household odors without worrying about second-hand pollution 【Warm Maintenance Tip】 You may need to replace your filter earlier or later depending on how often you use your air purifier. Using your air purifier in an environment with relatively high pollution may mean you will need to replace the filter more often, Weight: 2.0 Pounds, Manufacturer: LEVOIT