Filtrete UT03-6PK-1E Air Filter, 20 x 25 x 1, White, 6 Pack 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 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 Outperforms fiberglass, Washable and non-electrostatic pleated 1 inch filters