*Safe Plus Pre-Filter contains antibacterial properties(Zinc oxide). **KOTITI and FITI have verified to remove 99.9% of 3 kinds of bacteria(Staphylococcus aureus, Klebsiella pneumoniae and Escherichia coli).
*BAF has certified that the filter is coated to remove harmful substances - such as house dust mite, fungi, and mold floating in the air - that can cause allergies.
*TUV has verified to remove 99% of 3 kinds of adhering bacteria(Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa). **Intertek has verified that tobacco adhesive odor intensity is reduced from 3.6 to under 1.5 after 60 minutes. (Toluene, Ammonia, Acetic acid)