Interesting. I was at physical therapy and told the gal helping me that the masks were to me like wearing a Petri dish and that I have a hard time breathing through them. Before I was finished for the day the head therapist came over to make it a point (in a fairly nice way) that I’m out of shape and that the patients who have had heart attacks wear masks where they do their therapy and they do just fine. Sure, I’m am out of shape after two surgeries in six months, hence the therapy. I’m not good at good come backs but I wished I would would have told him that they would probably do better without the masks. By the way, this head therapist wears two masks. I don’t see how ones like him do it.