3-in-1 True HEPA Filter bring healthier air to your family: Pre-filter, activated carbon filter and true HEPA filter work seamlessly together to eliminate 99.97% of airborne particles, as small as 0.3 microns, such as pollen, indoor allergens, air dust, pet dander, kitchen fumes, and cigarette smoke.

TT-AP003 Compatible Air Purifier: It is recommended to use this true HEPA replacement filter with your TaoTronics TT-AP003 Air Purifier (sold separately) to extend the air purifier life