Then, also, we're all cooped up in the house with fabric and sewing machines so why not?
I sifted through lots of patterns online and made a few mock ups until I settled on the one I like the best which is THIS ONE
Rather than the flat rectangle with pleats, which most patterns seem to be, this one is contoured so it really hugs your face. I omitted the wire to go around your nose, because it really wasn't necessary. And since elastic is hard to come by, I modified it to use hair elastics (of which I have plenty.)