Instructions for use: 1. This product complies with the standard GB2890-2009. Please read this manual carefully before use and understand the entire contents.2. Put the mask headband on top of your head.3. Hold the ends of the straps with both hands and pull the straps out so that the mask completely covers the nose and mouth area. Attach the fasteners behind the neck so that the mask is closed to the face.4. Pull the end of the strap again and tighten it.5. Before use, check the mask to determine whether it is properly closed. Put the palm of your hand over the air intake surface of the filter cartridge and gently inhale it for 5-10 seconds. If the mask is slightly recessed, it will prove to be effective. In the air leakage, adjust the mask and readjust the tightness of the elastic band, eliminate the leak, and re-do the closed investigation until it is qualified.6. In the use process, when the user smells the odor or the suction resistance increases, the life of the filter box has expired, please immediately change the filter box or filter cotton.Special precautions for users1. Please do not use this mask under oxygen concentration below 18.2. Please do not use in the following situations:Unknown substanceConcentration of harmful substances reaches concentrations that immediately endanger life and healthWhen you smell or taste harmful substances.3. Do not modify this mask4. Do not use this mask if your face is not in close contact with the mask because of your beard, facial beard or other reasons.5. Qualified persons should use pre-use training before use.6. When not in use, store the mask away from contaminated sites and seal it.Package includes: 1 gas mask
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