AERAMAX SE REPLACEMENT FILTERS - One Filter, Three Functions: Combined Pre-Filter, H13 True HEPA and Carbon Filter - H13 True HEPA Filtration: Captures up to 99.95% of particles as small as 0.1 microns including allergens, pollen, dust, pet dander and smoke - Long-Lasting Performance: One-year estimated filter life (depending on usage conditions) - 1 combo filter included: Perfect for quick filter changes