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Firmly absorbed on activated carbon filter eliminates odor 4 layer containing carbon film structure Biological virus blocking efficiency and bacterial filtration rate and particle filtration rate 99% cut! Guards tech processing (containing diagonal stitches) and nose Ritter recruitment compared with adhesion to the face
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Make sure this fits by entering your model number. MaterialMade of N95 grade quality materials,6 Layer Protection,activated carbon layer,non woven fabric layer,efficient N95 filter Layerdouble hygroscopic sweet layer and soft non woven fabric layer.
When in use, it depends on several factors, what type of threat and the concentration. Typically the activated carbon part will saturate first ahead of the particulate filter. Up to 8 hours or less or even just a few minutes if the gas concentration is really that high for the carbon filter.