2 ms·
1st rule of masking is to SHAVE one's face ---- if one is truly interested in proper respirator fit. Next if one is trying to filtrate flu sized particles mask
by daVe23hu 4y ago
1st rule of masking is to SHAVE one's face ---- if one is truly interested in proper respirator fit. Next if one is trying to filtrate flu sized particles masks are ineffective.