1.[Perfect Compatibility] Compatible with Winix 5500-2 Air Purifier Filter Replacement and Winix AM80 Air Purifier Replacement Filter, 116130 Replacement Filter H 2.[Excellent H13 True HEPA] The 5500-2 replacement filter set is equipped with a high-efficiency H13 True HEPA filtration system, professionally designed to capture 99.97% of particles as small as 0.3 microns, creating fresh air for you and your family, allowing you to breathe and sleep more easily. 3.[Advanced Activated Carbon Odor Filtration] The 5500-2 filter is designed with high-quality activated carbon to effectively prevent pollutants from circulating in the air, filtering odors from smoke, cooking fumes, and volatile organic compounds (VOCs). For optimal performance, we recommend replacing the 5500-2 H13 True HEPA filter every 8 - 12 months and the 5500-2 Activated Carbon Filter every 12 months (depending on your usage and environment). 4. [Pet-friendly] This 5500-2 air purifier filter set is made of environmentally friendly materials, targeted at pollen, pet dander and pet hair, with a medical-grade H13 true HEPA filter layer, special treatment for pollen and pet odors, and high-quality non-woven fabric technology to improve the performance of the air purifier, making it an ideal choice for pet owners.