OUTPERFORMS FIBERGLASS, WASHABLE AND NON-ELECTROSTATIC 3-month pleated 1 in. home air filters for your furnace, air conditioner or HVAC system | DESIGNED WITH EXCLUSIVE Filtrete Brand 3-in-1 technology from 3M to trap unwanted air particles while letting cleaner air flow through | ATTRACTS AND CAPTURES microscopic particles such as smoke, cough and sneeze debris, bacteria and viruses-and large particles, including lint, household dust and pollen | 1900 MPR has a rating of MERV 13 | The higher the MPR, the more microparticles-such as pollen, pet dander, smoke, bacteria and viruses-your filter will capture from the air passing through it | 62% SMALL PARTICLE CAPTURE, like bacteria and particles that carry viruses ( % captured is based on ASHRAE 52.2 testing for 0.3 to 1 micron particles from the air passing through the filter, which relates to HVAC industry standard efficiency testing) | CERTIFIED as asthma & allergy friendly (As outlined in report ASCR: 1246-01) | FIND YOUR SIZE: 1900 MPR available in 4 in. , 4 in. slim fit and 5 in. thick air filters | FOR OPTIMAL PERFORMANCE of your heating & cooling system or HVAC system, change your home air filter at least every 90 days for 1 in. filters, and at least every 12 months for 4in. and 5in. Filters | A dirty filter will slow down air flow and make the system work harder to keep you warm or cool-wasting energy. Sign-up for a filter change reminder program that works for you!