4 ms·
* I work with masks. I wear them all the time. Without them I would inhale a lot of particles < 1 micron. But it's ok to down vote without a discussion.
by theGeatZhopa 4y ago
* I work with masks. I wear them all the time. Without them I would inhale a lot of particles < 1 micron.
But it's ok to down vote without a discussion.