Fine Preliminary Filter - Captures large particles such as pet fur, pet dander, lint, fibers and hair. Multi-layer Filter - Filters small particles such as dust , mold spores, and allergens such as pollen, pet dander and mites. Activated Carbon Filter - Adsorbs unwanted odors and fumes such as pet odors, cooking smells smoke, ammonia and VOCs. Notes: *Choose from a variety of replacement filters to best meet your needs. The Toxin Absorber Filter specializes in smog, toxins, and VOCs, while the Smoke Remover filter addresses smoke from wildfires, smoke, and other particulates. The Pet Allergy Filter captures fur and absorbs unpleasant odors.