soften heat n bond?
The best masks tested in a study from the fluids engineering
group at Florida Atlantic University were a simple two layer
"quilting cotton" mask, which dropped almost everything from a
simulated cough by 2.5" from the front of the mask. Commercial
"cone" type masks (8"), folded cotton handkerchief "no sew"
mask at 15". and a bandanna, 3 ft 7". Without a mask, droplets
traveled about 8 ft.
No need to add extra filtration.
Study here, including some amazing video:
https://www.fau.edu/newsdesk/articles/efficacy-facemasks-coronavirus.php
Kay
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