The Filtrete Refillable Air Filter comes with two collapsable air filters. These fit in the Filtrete Brand Refillable Air Filter frame, which is designed to last for up to 20 years. The filter captures 2X more microparticles than the MERV 11 minimum requirements and is Certified Asthma & Allergy Friendly, while creating 20% less waste. Save money on refills with collapsible filters that take up 75% less space than traditional air filters, and are packaged with curbside recyclable materials. The refillable filter lasts up to a year, and never sweat forgetting to replace the filter with 90, 180, and 365-day reminders from the Filtrete Smart App. It's a small change, with a big impact. Excludes damages, abuses, or alterations. Microparticles are 0.3- 1.0 microns in size. Based on weight. Comparable to equivalent size and Filtrete MPR Air Filters, based on MSRP.