My wife just picked up a couple black mesh masks. They are perfect for all the “mask police Karens” in your travels.
From 6’ away(proper social distance) they appear to be solid black material. Up close they have a mesh fabric with holes about 3mm across. This allows you to breath easily and not fog up your glasses.
I am not sure where she purchased them.
Wearing a modified, more breathable, mask makes the statement that you’re OK with being one of the sheep. F the masks. F the Karens. If you’re forced to wear one at a certain location, the mask should have a defiant and clear statement printed on it. (My doctors like mine.)