Easiest protective device is a shield because it rests on your forehead and upper back of your head. Someone in our small town has a 3D printer and has made lots of shields, for $15 ea., $10 to those of us who work for homeless charities. The shields are very helpful because many clerks wear them, which makes figuring out what they're saying far easier, both because a mask doesn't muffle speech and because you have all the usual visual clues.