re: #93 Love-Child of Cassandra and Sisyphus

My point is what qualifies as a “mask”. The paper you linked assumes the mask is actually a mask, that is, the airflow has to go through the cloth.

What I am lamenting are the simple bandanas people are wearing.

To get a proper mask, one could use any of the patterns online for sewing a simple mask, or there are even non-sewn examples with a little skill with scissors and folding.

Mrs Cranky has been making masks, but you can’t find elastic anywhere. Her latest use shoestrings that you tie behind your head.