There isn’t any type of face mask that protects you or others against nanometre-sized virus-laden particles being spread by breath. Even the full face mask used by spray painters only protects the user. If you are infected you are still expelling infected air. Most masks are a joke in stopping virus particles.
Watch this video.
In fact the prolonged use of the mask means you suffer from oxygen deprivation which causes brain damage. Also you are at risk of suffocation due to the increased levels of carbon dioxide accumulated inside the mask. It rapidly reaches over 5000 ppm which is toxic. What this video: Del Bigtree shows dangerous CO2 levels breathing with masks.