Mask use is near 100% here in Northern Virginia. I am surprised, however, how many people continue to use simple cloth masks when much better N95s and KN95s (Chinese equivalent to N95s) are widely available. Gold standard appears to be the Respokare N95s which are NIOSH approved (under Innonix) but are quite expensive. I also […] The post N95 and KN95 Masks appeared first on Marginal REVOLUTION.