Replacement Carbon Particle Add-On SmokeStop Folding Filter fits Blueair Pro M L XL Air Purifiers

To maintain optimal performance, filter change is recommended every 6-12 months (depending on air premium and use).. Filter Requirements: Pro M = 1 Filter, Pro L = 2 Filters, Pro XL = 3 Filters Features a V-shape butterfly fold and contains carbon pellets, designed for maximum removal of airborne pollutants, smoke, VOCs, and unwanted odors. appropriate with Blueair Pro M, Pro L and Pro XL Air Purifiers. Additional Carbon Filter add-on filtration layer for the Pro Particle and Smoke Stop filters