The One Products by Promounts OFAN-01 Replacement 3-in-1 HEPA Filter for NEO and Athena Air Purifiers fits NEO SMART Air Purifier OSAP01 and Athena SMART Air Purifier OSAP02. Its first laye, the pre-filter, catches large particles such as hair, dust, and pet dander. The second layer is a true HEPA filter and works as an air sanitizer. It removes air pollutants such as viruses, pollen, allergens, bacteria, dust mites, gases, cigarette smoke, and many more. The third layer is the active carbon filter which absorbs odors, benzene, and formaldehyde. The OFAN-01 replacement air filter provides high-quality air filtration by removing 99.97% of odors and particles for a better breathing environmentFeatures: 3-stage filtration—pre-filter, HEPA filter, and activated carbon filter; Fits NEO SMART Air Purifier OSAP01 and ATHENA SMART Air Purifier OSAP02; Purifies and protects the air from dust, mold spores, and various allergens; Captures large and small particles in the air; Eliminates 99.97% of odors and particles; Removes toxins from any home, office, apartment, or workroom; Absorbs and rids air of odors