Exclusively designed for air purifier to maintain its peak performance. With cost-effective price to save much cost for your all year round air cleaning need. HEPA Filter meets the High-Efficiency Particulate Air (HEPA) standard. It filters the fine airborne particles. 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. Perfect for those who are sensitive to the surrounding air quality. It will not release hazardous substances or ozone.