The Filtrete Refillable Air Filter Kit comes with a reusable air filter frame and two collapsible MPR 1550 air filters to get you started capturing 42% more microparticles with 20% less waste. Certified Asthma & Allergy Friendly, the collapsible refillable filters take up 75% less space, saving space and money on refills throughout the frame's designed 20 year life span. Changing filters is a breeze with less than a minute assembly, and the Filtrete Smart App can alert you when it's time to refill. Who said a small change can't make a big impact? More microparticle capture than MERV 12 minimum requirements. (Microparticles are 0.3- 1.0 microns in size.) 20% less waste than traditional Filtrete Air Filter by weight Less than comparable sized traditional Filtrete Air Filters, based on MSRP. Excludes damages, abuses, or alterations.