ARABIAN SEA (Oct. 13, 2010) Logistics Specialist 2nd Class Jessica Gonzales, from San Antonio, performs a fit test on a P100 respirator to ensure a proper seal aboard the aircraft carrier USS Harry S. Truman (CVN 75). The Harry S. Truman Carrier Strike Group is deployed supporting maritime security operations and theater security cooperation efforts in the U.S. 5th Fleet area of responsibility. (U.S. Navy photo by Mass Communication Specialist 3rd Class David Giorda/Released)

Face fit testing

Correct fitting and fit testing of filtering face piece respirators

Fitting the mask

Respirators are available in different designs and sizes. Some are valved and some unvalved – both options provide a high level of protection when worn correctly.

  • Fit testing is a means of assessing how well a respirator seals to a face
  • It has to be an individual test because one model will never fit all and every face is different
  • Fit tests may fail, and protection will be lost, if the mask isn’t being worn properly.
  • Sometimes a mask simply won’t fit an individual, but often a better fit can be achieved by taking more care when putting it on. Wearers must be clean-shaven to get a good fit with a respirator.
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