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I’ve just bought a new set of masks called KF94s that I really like. They fit well, have added flaps to close gaps around the face and include a moldable band to tighten the fit around the bridge of the nose. Now I wear a KF94, a type of mask made in South Korea that can be purchased easily online, covered by a cloth mask. I recently learned about the KF94 from Dr. Ashish K. Jha, dean of the Brown University School of Public Health. Dr. Jha notes that the gold-standard N95 masks are still hard to find, and we should save them for health workers. The KF94 mask resembles an N95, with some differences. It’s made of a similar nonwoven material that blocks 94 percent of the hardest-to-trap viral particles. But the KF94 has ear loops, instead of elastic head bands, so it won’t fit as snugly as an N95 — although double-masking can help close any gaps.
The KF94 is also disposable — you can buy a pack of 20 for about $40 on Amazon. While you can let a KF94 mask air dry and reuse it several times, it can’t be laundered and won’t last as long as a cloth mask. One solution is to save your KF94 mask for higher-risk situations — like riding a subway, spending time in a store or going to a doctor’s appointment.
And speaking of masks: If you, like me, shouted at your television when you saw Chief Justice John Roberts’s mask slipping below his nose at the inauguration, then you’ll enjoy this story from my colleague James Gorman on the Science desk: Is Mask-Slipping the New Manspreading?