4 ms·
Unless you are doing work that involves lots of tiny particulate matter (and even if you do), I think 50 n95 masks is pretty darn excessive. Most people don't e
by ksml 7y ago
Unless you are doing work that involves lots of tiny particulate matter (and even if you do), I think 50 n95 masks is pretty darn excessive. Most people don't even wear them correctly.