So either the tweeted video is either BS or OSHA standards are overly strict...
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This isn’t B.S. My friend had lung cancer operation a week after I had 2 heart attacks...
Now when she puts on her mask, her oxygen level goes down to the point of panting...when I put on my mask, due to the heart attacks, my oxygen levels goes down...
I talked to my doctor, told him I wanted to make masks and give them away so every could have a mask, he told me to use a strech type of material, my friend started using one of mine and she is fine with it...so am I and others I have talked to about it...
It’s the material to be able to breathe in that counts...regular material will block the oxygen flow...
I have asthma and can’t stand regular N95 masks, plus the material it’s made of irritates the heck out of my skin. So when I need a mask* I use 100% cotton masks with cotton ties. I don’t know where to buy them, a friend gave me a bunch years ago. I can wear them very loose too since ties are adjustable.
*When I mix herb formulas or go in DH’s horrible truck that stinks, then I put essential oils on it).