P400 Smog Filter Reduces tobacco smoke, harmful gases such as VOCs, formaldehyde, odours and exhaust fumes. Pre Filter +HEPA+Active Carbon. Filters dust, pollen, hair, allergens, viruses, bacteria, mi more→cro organisms, harmful gases, odours Use with boneco p400 air purifier Filters dust, pollen, hair, microorganisms, fungi, bacteria, germs, insecticide, harmful gases, odours Reduces tobacco smoke and odours Removes 99% of particles and fine dust