Alen (BF15A HEPA-Pure Replacement Filter for A350 Air Purifier, 1-Pack Creates an allergy and asthma friendly environment by removing dust, pet dander, mold spores and pollen from the air Helps maintain a clean household by reducing dust Pre-Filter layer extends the life of the filter Eligible for Alen's convenient Auto Ship Filter Plan with FREE Shipping Includes Alen's Lifetime Limited Warranty for country of purchase