Maintain a healthier home or office with the Fellowes AeraMax True HEPA Filter for AeraMax 90, 100, and DX5 Air Purifiers. The filter captures up to 99.97% of allergens, viruses and other harmful particles to ensure clean, refreshing air. There's no need to worry about foul odors when using the filter, as an antimicrobial treatment keeps mildew, fungi and bacteria at bay.