Reference:

“Filtering out Confusion: Frequently Asked Questions about Respiratory Protection - User Seal Check.” U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, April 1, 2018. https://doi.org/10.26616/NIOSHPUB2018130.

What does this mean?

There are only three very simple steps to making sure your mask fits. Make sure:

• Your mask collapses when you inhale
• Your mask expands when you exhale
• No air is leaking between your face and mask

If there is leakage, readjust your mask or put on a different one.

You should do this fit check every time you put on your mask. It takes less than a minute!

Readjusting doesn’t work. What now?

Don’t worry! There are many easy ways to improve your mask fit. Check out our guide in the next section.

Up Next: How do I improve the fit of my mask?

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