Realistic much? Masks are 1 use and dispose. You touch it to take it off and put it on again, it is contaminated. COVID 19 virus particle size is 125 nanometers (0.125 microns); the range is 0.06 microns to .14 microns. An N95 mask filters down to 0.3 microns, so, N95 masks block few, if any, virions (virus particles).