When wearing an N95 respirator, it is important that your respirator fits your face to ensure optimal protection. If a tight seal is not formed between the respirator and the facial area, contaminants could leak into the respirator.
This is why, prior to using an N95 respirator, a fit test must be completed using the same make, model and size of respirator you will be using moving forward.
![](https://i.ytimg.com/vi/lq0S3rrNq6Y/maxresdefault.jpg)