Why We Need to Upgrade Our Face Masks--and Where to Get Them
A wealth of evidence has shown that wearing a face mask helps prevent people from spreading the virus that causes COVID, SARS-CoV-2, to others and from becoming sick themselves. But there has been less guidance from public health officials on what kind of masks provide the best protection.
Early on in the pandemic, the U.S. Centers for Disease Control and Prevention and the World Health Organization told the public not to wear N95 respirators, a type of mask that is made from high-tech synthetic fibers and provides a high level of protection against virus-laden airborne particles called aerosols. That was because there was then a shortage of such masks—and health care workers desperately needed them. At the same time, both agencies said there was little risk of aerosol transmission of SARS-CoV-2. They recommended cloth masks or other homemade face coverings that can stop some relatively large virus-carrying droplets even as it became clear that SARS-CoV-2 commonly spreads through aerosols—and as the supply of better-quality masks increased.
There is now a cornucopia of high-filtration respirator-style masks on the market, including N95s, Chinese-made KN95s and South Korean–made KF94s. They have been widely available and relatively affordable for months and provide better protection than cloth or surgical masks. Yet it was not until September 10 that the CDC finally updated its guidance to say the general public could wear N95s and other medical-grade masks now that they are in sufficient supply.
Read the rest at: https://www.scientificamerican.com/article/why-we-need-to-upgrade-our-face-masks-and-where-to-get-them/
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... many to me. 
They don't have the N95 electrostatic layer that traps the smallest aerosols.
It's family run, and that's what he ordered. And in the beginning I passed them on to family and friends. Since then, he's ordered some others, has tried to talk me into "pretty" masks, but I've stuck with the KN95s. 
With snacks, drinks and tobacco products. I'm actually old enough that I can remember when you could get your car serviced or repaired at the same places you bought gas - no food products available. My parents got their cars serviced at a nearby Mobil station and knew the owner and the mechanics. These days, I take my car to the dealership where I bought it. And that same Mobil station is practically a grocery store... 
I need the in-between size. But thanks! Maybe I’ll order a few just so see if they’d work. 
