HIGH-EFFICIENCY H13 FILTRATION: Adopts a true H13 grade HEPA filter that meets the HEPA (High-Efficiency Particulate Air) standard. It can capture 99.97% of airborne particles smaller than 0.3 microns, which can filter fine airborne particles such as pet dander, dust mites, and pollen, effectively helping to reduce allergies. PREMIUM 2-IN-1 FILTER: Our Dyson filter is made of premium non-woven fabric and durable ABS shell and consists of 2 filtration layers: 1. The pre-filter can capture large dust, hair, lint, or pet dander. 2. The H13 HEPA filter captures smoke, pet dander, pollen, and fine airborne particles. PERFECT FIT: Our replacement HEPA filter is compatible with Dyson HP04 TP04 DP04 PH04 HP09 TP09 HP07 TP07 PH03 PH01 air purifier. This value pack includes 1 Dyson filter, spend less but get the same quality and functionality of the original filter. EASY TO REPLACE: No complicated steps are required, after removing the old filter, you can directly install the new one. Replacing