It's Worse than they tell us. Three things that all of the masks do:

1. Deprive one of oxygen. Posers have taken offense to my term, "Suffocation Cloths.".
As far as I'm concerned, I will do without. They can wear a triple layer hefty garbage bag as one if they really want to.
There are many O2 sensor tests and CO2 tests with all types of masks on video . We don't need to wait on a press release from the CDC do we?
2. CO2 toxicity. Levels increase with time. Nuff said.
3. https://www.brighteon.com/4ad71ee5-b538-464c-970e-77b2559f4428. Video of a physician's perspective that has clinical experience with this issue. I think this will back what you are saying BS.