This Levoit Core 300 Replacement Filter is exclusively designed for Levoit Core 300 air purifiers to maintain their peak performance. It features a High Efficiency Carbon Filter with Air Reborn Odor Removal Formula and high-grade granular carbon, making it more effective at absorbing and chemically decomposing pet allergies and odors. The filter utilizes True HEPA Technology, meeting the High-Efficiency Particulate Air (HEPA) standard, to filter fine airborne particles like pet dander, dust mites, and pollen, thereby improving allergies. Additionally, the ultra-fine Nylon Pre-Filter captures larger particles such as dust, lint, fibers, hair, and pet fur, extending the filter's lifespan. It is recommended to replace filters every 6-8 months for optimal performance. The filters are sealed to protect their service time. Please remove the plastic packaging before using the new filters. For any support needed, contact Levoit Customer Service.