The gold standard in masks has been the N95, with its extra-tight fit. There’s also the KN95 from China, which also offers high filtration but is somewhat looser fitting. But a year into the pandemic, buying a legitimate heavy-duty medical mask online remains downright maddening. Counterfeiters have flooded the market with fake N95s and KN95s, even on trusted sites like Amazon. Brian X. Chen recently spent hours comparing masks online and learned about how to spot fraudulent mask listings and how to sidestep fake reviews.

Source: New York Times February 17, 2021 12:00 UTC