How do I make sure I have the right size of APR?

Facial hair, sideburns, bangs and headwear may prevent a protective facepiece from forming and/or maintaining a tight-fitting seal on someone’s face. It is recommended the user be clean shaven and/or hair pulled back for sizing and using the respirator to ensure an appropriate seal. Also, as a rule of thumb, your eyes should be at, or just above, the center line of the eye lenses. Wearers must always conduct a negative pressure fit check prior to use to make sure the respirator will seal to the face. Wearers are advised to conduct a quantitative fit test, at least annually, to confirm the correct respirator size continues to be appropriate. To ensure you have selected the correct size you should perform a negative pressure test. For the C50 and FM54 you will need to make sure you have one side of the mask with a 40mm cap in place before starting. The negative pressure test can be performed by putting the mask on your face, breathe out, then block the inhalation valve and take a deep breath. For the FM50 with filters fitted; you will need to cover the inlet ports of both filters and breathe in. The mask should collapse to the face and while holding breath, the respirator should remain collapsed. If the respirator remains collapsed, the respirator is properly fit.