When this whole quarantine, isolation, face mask thing began; the only face masks you could get were the disposable paper masks.
Then a few months into the quarantine cotton ones became available. The first I saw were made by Hanes in plain white & looked like they took tighty whiteys off the production line and resewn them to fit your face. I promised myself I'd never buy them, I don't even wear tighty whiteys when I wear male underwear.
Still later others showed up, I found these at WalMart and swear some company pulled some cotton Day of the Week panties off the production line. I had to pick some up just because, unfortunately they don't have the weekend.