Blueair 303 300 Compatible & - Filter Blueair Purifier Air Replacement 200 Filter Air 8-Pack

Replacement Blueair 303 Humidifier Filter; Quantity: 8 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 quality and use. Essential for Allergy Sufferers.