Beards

I have to take fit tests with work.

That's why I keep it all inside the mask.

Full Manchu with a goatee. Everyone else runs around shaving, and here I am, going about my daily routine with a respirator

The guy at work who was giving the tests (who is not a qualified medical professional and was also not sanitizing the equipment in-between tests) was automatically failing anyone with facial hair regardless if they could pass or not.