Fitted N95 > cotton > fleece, bandana, knitted.
https://www.cnn.com/2020/08/08/us/duke-university-face-mask-test-trnd/index.html
There's a pandemic wave / virus particle duality joke in here somewhere.
QOTO: Question Others to Teach Ourselves An inclusive, Academic Freedom, instance All cultures welcome. Hate speech and harassment strictly forbidden.