Dale, those face shields give me claustrophobia too in a way, interesting you should mention that. I finally figured out why recently when doing a bunch of work with an electric angle grinder for which I always wear earmuffs and a particle mask: the face shield by itself deflects sound from the workpiece in a confusing way, making me constantly and subliminally itch to take the thing off, such as when running the bench grinder or a dremel (safety glasses never seem to keep all the stuff out). But when I have my ears covered too and am encased in a nice sensory- dampened bubble, the shield doesn't bother me a bit. I think we rely on sound cues more than we realize when working with things and a face mask is the auditory equivalent of wearing kaleidoscope glasses.