Here is a CDC article about making a respirator mask with t-shirt cloth. Towards the end it states... “We showed that a hand-fashioned mask can provide a good

Here is a CDC article about making a respirator mask with t-shirt cloth. Towards the end it states... “We showed that a hand-fashioned mask can provide a good fit and a measurable level of protection from a challenge aerosol.” https://wwwnc.cdc.gov/eid/article/12/6/pdfs/05-1468.pdf https://wwwnc.cdc.gov/eid/article/12/6/pdfs/05-1468.pdf