Are KF94 Masks Effective—And How Are They Different From KN95 Masks?

Are KF94 Masks Effective And How Are They Different From KN95 Masks?

What do doctors think of KF94 masks?

Experts say they're worth trying. "Clearly, we need good masks now," Rajeev Fernando, MD, an infectious disease physician working in field hospitals across the country, tells Health. "N95 is the gold standard, followed closely by the KN95 and KF94."

But Dr. Adalja points out that KF94 masks—along with N95s and KN95s—can be harder to breathe in than cloth face masks. "They're more difficult to wear," he says, adding, "I don't think that the general public needs to wear a mask at this filtration level." Still, he says, a KF94 "doesn't take away from hospital supplies," which is important for the medical community.

How to buy KF94 masks

There are some KF94 masks for sale at Amazon, but Collins is concerned about potential counterfeits, given that this has been a problem for the site with other mask styles. "Amazon doesn't have any method of qualifying the vendor," he points out. "But, if you go to Target, Walmart, Lowe's, Ace Hardware, or a store like that, you know there was someone affiliated with the company who purchased those."

Bizarrely enough, Collins says his tests have found the highest quality KF94 masks through Korean beauty websites like "These sites are the first to import these masks in the US," he says.

The information in this story is accurate as of press time. However, as the situation surrounding COVID-19 continues to evolve, it's possible that some data have changed since publication. While Health is trying to keep our stories as up-to-date as possible, we also encourage readers to stay informed on news and recommendations for their own communities by using the CDCWHO, and their local public health department as resources.

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