Tiny little problem. Nobody wears them.
My husband is mostly deaf and lip reads. It would do no good for him to wear a mask with an insert as it is not his lips that he reads.
In fact like me he does not wear a mask at all.
“Tiny little problem. Nobody wears them.”
I would think that the plastic insert would make it twice as hard to breathe than with a regular mask.
The only time I wear a mask is for hour-long physical therapy twice a week. I can hardly breathe in it, even though the therapy isn’t exactly strenuous. I can’t imagine a layer of plastic instead of fabric.