Prevention and Filtering: Prevent against organic vapors,such as benzene, aniline, carbon tetrachloride, nitrobenzene, chloropicrin, chlorine, acetone, alcohol, carbon disulfide etc. Warm Tips: When you use filter cotton in humid or steam environment, please change it regularly to make sure breath smoothly, as it can absorb steam and dust; If you find the filter has slight carbon leakage of 1-2 tablets activated carbon, please do not worry. If there are more than 5 tablets activated carbon, replace the cartridge asap to avoid unsafe usage. The filter cotton can not be washed with water.
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