https://www.siliconvalley.com/2021/02/18/cloth-or-n95-new-standards-will-take-the-guesswork-out-of-choosing-the-most-effective-face-masks/

Americans may soon be able to choose between two clearly labeled levels of face mask protection while browsing store shelves.

The new national mask standard outlines minimum fit, design, performance and testing requirements for face masks and would require user instructions, package labeling and a permanent tag on the product.