[mn-bush-man]

I see in your last link that vacuum bags are mentioned. I have a buddy who owns a vacuum repair/sales business. He is making masks (an enlisting help) as fast as he can (and donating them to hospitals, nursing homes, etc). It’s pretty neat that he can contribute in this way.

[familyop]

"I see in your last link that vacuum bags are mentioned. I have a buddy who owns a vacuum repair/sales business. He is making masks (an enlisting help) as fast as he can (and donating them to hospitals, nursing homes, etc). It’s pretty neat that he can contribute in this way."

That's good to see! If any of the workers exert too much for the filter and have trouble breathing easily enough through them, the area (the size) of the filter should be increased.

I'm helping someone with making cloth masks. The filtering is not as thorough (~50%-60% as differentiated from 95% or whatever), but some people are required to exert more (lifting, squatting, etc.) and breath more. We might try some with filter pockets (hepafilters or whatever), but they'll need to be larger and more protuberant.