Why is periodic refitting of the mask necessary?

Periodic refitting of the mask is necessary to ensure a proper seal and fit. As a user wears the SCBA, various factors may cause changes in the shape or size of the face, including weight fluctuation, facial hair growth, or age-related changes. A proper seal is crucial for the effectiveness of the SCBA, as any gaps can allow contaminated air to enter the mask, compromising the user's safety in hazardous environments.

Regular refitting ensures that the mask conforms correctly to the individual's face, maintaining its integrity and effectiveness. This proactive measure helps to provide reliable protection, making it a vital part of SCBA usage and training.