Scientists who tested a variety of cloth face masks found that a nylon overlay significantly boosted how well they work. Researchers not involved in the study praised the finding.
The device measured the number of particles immediately outside and inside each mask while someone was wearing it. A surgical mask was also tested as a baseline measurement; it blocked out 75% of the particles on average, which is in line with other testing that has suggested that surgical masks filter out between 60% and 80% of small particles in a lab setting.ring of material, about 8 to 10 inches deep, from one leg on a pair of pantyhose.
As research into homemade masks grows,"we'd like to see recommendations from the CDC or elsewhere in the world, from other public health authorities, on what are the best ways to do it," he says.
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