If you read the box or packet they come in it even tells you. Yet the Mask Moron choose to believe the media and the Government. They’re are no studies on various types of paper and fabric masks to claim they work against a virus. Plenty evidence out there to say masks are detrimental to health.
Again you won’t find the information on this website on your t.v set.. The TV media are owned and funded by the liars pushing the New World Order which masks are apart of.