// It has never included wrapping a couple of pieces of fabric over your face.//
I would hope not, pixie. But the public at large has not had the benefit of such training. More than that, the current (Nov 4th) guidance from the government, says this:
"You can buy reusable or single-use face coverings. You may also use a scarf, bandana, religious garment or hand-made cloth covering but these must securely fit round the side of the face."
There is no restriction on the fabric to be used, or how thick or non-permeable it must be. Taking it literally, a piece of net curtain will suffice so long as it fits properly. It's an absolute joke.