What is the best face mask? Expert breaks down N95, KN95, KF94 and how to spot a fake

What is the best face mask? Expert breaks down N95, KN95, KF94 and how to spot a fake

A self-proclaimed “mask nerd” warns that not all face coverings are alike, but the best ones work wonders.His unmasking advice hits as cloth coverings are out and CDC-recommended respirators are in. But all the options present a daunting challenge as omicron lurks, but that’s where mechanical engineer and aerosol science expert Aaron Collins comes to the rescue.Self-proclaimed "mask nerd," mechanical engineer and aerosol science expert Aaron Col…