When it comes to cloth masks, has anyone ever checked to see the link collected from a washing machine or cloths dryer? That is the crap you might be breathing in. As for the paper ones I am guessing as they break down, the same thing happens. I know paper towel, which some has said add to a mask sheds stuff. Just find a good stream of sunshine and bang on it for a bit and you will see the pascals fall off. For all I know paper masks might do the very same thing. Get a bunch and bang them while in front of sunshine and see what falls off, when they are new right out of the package. If paper towels sheds they probably do too. I refuse to wear any mask as they make you sick but they also have stuff that you breath right into your lungs. So not a good thing. The bacteria, fungus build up on them is not a good thing either. And the list goes on.