Не стоит так презрительно о масках из хлопка и шёлка:
Проведены исследования CDC с материалами по защите от ковида, двойной барьер из плотного хлопка и шелка от вируса.
The researchers found that a sheet of tightly woven cotton — of 600 threads per inch — plus two sheets of chiffon, made from polyester and spandex, seemed to make the most effective combination, filtering out 80–99% of the particles, depending on their size.
Other combinations that perform well, according to the researchers, are tightly woven cotton plus natural silk or flannel, and cotton quilt with cotton-polyester batting.
The researchers explain that combinations involving a fabric with a tight weave, such as cotton, and one that can hold a static charge, such as silk, are likely effective because they provide a double barrier: mechanical and electrostatic.
https://www.medicalnewstoday.com/art...s-also-crucial