Pre-Filters (8 Pack)AllerAir Pre Filter Replacement 8 Pack The Pre Filter 8 Pack is designed for use with AllerAir air purifiers, serving as the first layer of defense against larger airborne particles. Captures dust, hair, lint, and other larger debris before they reach the main HEPA and carbon filters Extends the life of your primary filters and helps maintain optimal airflow and purification performance Easy to replace and essential for keeping your unit running