At Filter Monster, we have over 25 years of experience helping customers breathe cleaner, healthier air with filtration solutions that combine performance, reliability, and value. Our BA211-FM1 HEPA filter replacement is compatible with the Blueair Blue Pure 211+ Auto air purifier. The HEPA filter material captures up to 99.97 percent of particles as small as 0.3 microns and is designed to help filter dust, pollen, dust mite matter, and pet dander with the interior carbon mesh filters, smoke and cooking odors. This helps to reduce airborne contaminants and improved indoor air quality and relief from allergy or asthma triggers. Helping to provide cleaner air around you. The 360-degree design provides excellent surface area to filter your air. This allows air to be drawn in and filtered for all directions, helping to ensure improved indoor air quality. To ensure effective filtration, it is recommended to replace the HEPA filter every six (6) months or more often depending on air quality and environmental factors. Each package includes one (1) high quality Filter-Monster HEPA Filter Replacement Compatible with Blueair Blue Pure 211+ Air Purifier. When purchasing Filter-Monster, you get more than a filter - you get peace of mind and real savings because you chose to purchase a high-quality, cost-effective solution to clean the air around you.