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Wearing instructions:
Note:
Please refit the filter cotton before wearing the mask
1 ） Put the top headband on the head（Fig. 1）.
2） Put the mask over the mouth and nose, and then fasten the buckle below at the back of the neck（Fig. 2）.
3） Adjust the upper and lower headbands so as not to block the field of view and maintain optimal airtightness. If necessary, adjust
the headbands again（please adjust both sides at the same time so that the mask cannot deviate from the center of the face）.
Note:
Please perform negative pressure airtightness test after wearing the mask, and if it has improper airtightness, please do not
enter the contaminated area
Negative pressure airtightness test methods:
Put the palm of your hand on the filter cotton bracket of the mask（Fig. 3）and inhale gently. If the mask is slightly depressed against
the face, and there is no air leakage between the face and the mask, it means a good airtightness. If you feel the air leakage, please re-
adjust the mask position or adjust the headband to prevent air leakage. Repeat the above negative pressure test until good airtightness
is achieved.
Note:
If the mask you wear has improper airtightness, please do not enter the contaminated area
Replacement and maintenance of accessories:
It is recommended to clean and check all accessories after each use and replace the damaged components. For the sake of your safety,
please replace the accessories with original ones.
Replacement of filter cotton:
When the breathing resistance increases and you feel uncomfortable or a slight odor during use, replace the filter cotton. Press "》"
firmly on the main body of the dust mask to open the main body, insert the filter cotton, and then press to close the main body （See Fig. 4） .
FH0408
Fig. 1
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Fig. 2
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