Quote Originally Posted by Lost It View Post
FFP3 is a dust mask spec. It's not able to stop bugs. You need a "Face Fit" type. No facial hair, of a type that for instance Asbestos removal workers use with replaceable filter casings and seals that can be cleaned every time they are used. They aren't comfortable but they will block azzy fibres.

HSE has good guidance on RPE. I guess FFP3 will do if there's nothing else, but they cannot be pre-wetted with any kind of fluid. Best defence would be to breath in through your nose. As well as an FFP3 mask.
They will be useful if you can't get out of the habit of touching your face though.

Respiratory protective equipment (RPE)
Yes, you need the mask to be fit tested and fit checked.