[QUOTE=Trip7;3191789]The primary function of masking is to protect others from yourself in the case you're an asymptomatic carrier. If you're looking to protect yourself from COVID-19 by wearing mask in the flight deck with the door closed you'll need at least a N95, SN94, or KN95 mask. Those masks will leave temporary lines on your face after extended use.

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Don’t forget to protect your eyes too.