Filtrete Healthy Living Ultimate Allergen Reduction Filter, MPR 1900, 24 x 24 x 1-Inches, 6-Pack Product Description Keeping your home clean and healthy is your mission and Filtrete Healthy Living filters can be your perfect partner. Featuring high performing electrostatic technology, Filtrete Healthy Living filters proactively capture dust, bacteria, germs, viruses and allergens in your air. For optimum performance, change your filter every 90 days or sooner. From the Manufacturer The Filtrete Select Healthy Living filter attracts and captures airborne household dust, lint, dust-mite debris, mold spores, pollen, pet dander, smoke, bacteria, and particles that can carry viruses. Featuring high performing electrostatic technology, Filtrete Healthy Living filters proactively attract and capture microscopic particles, including: PM 2.5 air pollution, candle soot and smoke, cough and sneeze debris, bacteria and viruses along with large particles like lint, dust and pollen from air passing through the filter , Designed with Filtrete Brand 3-in-1 technology from 3M to pull in and trap unwanted air particles while letting clean air flow through , 4 times better small particle capture compared to non-electrostatic pleated filters for the capture of 0.3 to 1.0 micron particles. , Outperforms fiberglass, washable and non-electrostatic pleated 1" filters , Microparticle Performance Rating MPR 1900 equates to Minimum Efficiency Reporting Value MERV 13