You can always take the mask off if you don't need it or facial expressions are ...

zdragnar 28 days ago | parent | context | favorite | on: Reasons I didn't become an EMT, ranked

You can always take the mask off if you don't need it or facial expressions are necessary. Start with it on, assess the situation, and then choose. Much better than getting a face full of nasty and then wishing you'd had it on.