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These masks are only effective when there is a good seal between the edges of the respirator mask and your face. But don't break the seal, because at that point, protection is compromised.
The masks we use in our video are 3M masks. If you use a different brand, check the instructions before you apply it.
These fitting instructions must be followed each time a mask is worn. Make sure that your face is clean-shaven. Respirators should not be worn with stubble, beards or other facial hair under the area
If air leaks at the respirator edges, work the straps back along the sides of the head to eliminate the leakage, and then repeat the process.
If you CANNOT achieve a proper fit DO NOT enter the hazardous area.
To remove the respirator, hold the corners of the respirator on both sides of your face, between your finger and thumb. Lift the respirator away from the face and then upwards, until the headbands come away from your head. As far as possible avoid touching the face-piece with your hands. Dispose of the respirator immediately in a clinical waste bag and DO NOT RE-USE, then wash your hands thoroughly.