High Value Pack：4 H13 True HEPA filters & 4 EXTRA replacement carbon pre-filters. You can just change the filters more frequently with pretty reasonable cost
H13 True HEPA: HEPA filters are made of H13 grade ture HEPA filter media, which can helps capture small particles as small as 0.3 mirons
Carbon Pre-filter: Carbon pre-filters are made of high efficiency activated carbon and sponge, which can help trap large pariticles and absorb odors coming from smoke and cooking
Our Guarantee: We will attach great importance to our product quality and your satisfaction. For any questions, please feel free to contact our customers service
