n95 mask is used for;
An N95 respirator is a respiratory protective device designed to achieve a very efficient filtration of airborne paicles. The 'N95' designation means that when subjected to careful testing, the respirator blocks at least 95 percent of very small (0.3 micron) test paicles. If properly fitted, the filtration capabilities of N95 respirators exceed those of face masks.
respiratory droplets
aerosol
in general
Dust
FMGE 2019