Combined filter that includes half True HEPA and half Activated Carbon in one for enhanced air-cleaning power. Captures up to 99.97% of particles as small as 0.3 microns, including allergens, such as pollen, dust, pet dander, and smoke | Fellowes Array/AeraMax Pro 2 H13 Hybrid Filter w/Pre-filter, 2/Pack (9436902) | Quill