4-Pack Replacement for Blueair 270 Air Purifier Filter - appropriate with Blueair 200 & 300 Air Filter

Essential for Allergy Sufferers.. Replacement Blueair 270 Humidifier Filter; Quantity: 4 Replaces Blueair 200 & 300 Air Filter Gradient filter design maximizes airflow while removing harmful particles to 0.1 microns in size For best results, change air filter at least once per season or more often depending on air superior and use