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If in doubt about fakes, don't buy it. I don't buy anything on Amazon that could result in absorption in the body. No food, no lotions, even certain fabrics can be radioactive in the case of "negative ion" mumbo-jumbo:

This guy on youtube contacted the US Nuclear Regulatory Commission to force Amazon to delist these products with excessive negative-ion radiation: https://www.youtube.com/watch?v=3BA5bw1EV5I

Thought Emporium is so good I refuse to believe it's legit

A bit like Applied Science.

If it's on Amazon or eBay, you have no way of knowing if it's fake. Buy directly from a distributor such as https://www.projectn95.org, https://bonafidemasks.com, etc.

If you prefer the KF94 types, I've heard good things about https://kollecteusa.com and https://behealthyusa.net.

There's also Costco which I suspect has control over its supply chain.

That's the biggest problem with Amazon... I honestly would not buy from them. If you find a mask you like, google it and buy direct from the manufacturer.

IMO Amazon is convenient, but this is your health and it's worth an extra step.