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! | Designed with Filtrete Brand 3-in-1 technology from 3M to pull in and trap unwanted air particles while letting clean air flow through | Captures micro-particles including: PM 2.5 pollution, smoke, cough/sneeze debris, bacteria, viruses, and large particles like lint, dust and pollen | Electrostatic air filter with Microparticle Performance Rating 1900 | 4 times better small particle capture compared to non-electrostatic pleated filters for the capture of 0.3 to 1.0 micron particles. | Lasts up to 3 months