True HEPA Filter Replacement Compatible with Membrane Solutions MSA3 and MSA3S Air Purifier 4-in-1 H13

3-in-1 True HEPA Filter: MSA3 Filter features a 3-stage filtration design: Pre-Filter Captures Hair, Pet Dander, and Fiber; TRUE HEPA Filter Captures Smoke, Dust; Activated Carbon Filter Quickly captures and neutralizes Bad Smells, Pet Odor and VOC to freshen the air quality.(New Upgraded with the structure and content of activated carbon and the odor removal effect is greatly improved)