On 6/29/2020 2:31 PM, FromTheRafters wrote:
Hawk expressed precisely :
On 6/28/2020 10:26 PM, micky wrote:
The cashier at the supermarket wears a black mask with what looks like
one of these on either side. Like the seashell from Shell gas stations.
I had hoped it was decoration, but it looks like these enough I think
it's just an "activated carbon filter".

https://www.amazon.com/Activated-Fil...tag=mozilla-20


Not only that, she talks low enough I've had to lean over once to hear
what she says.Â* "The self-checkout scanners are not on. " I knew that.
If they were on, that's where I'd be.

One comment:Â*Â* they are directional in that you can aim the exhaust some
what. Mine are pointed down and back towards my shoulders.

But these valves are meant to make breathing out easier, right? while
using the rest of the mask to filter the air that comes in, right?Â* It
seems that vents like this defeat the so-called goal of masks, to
protect the other people.


Masks with valves protects others from the wearer but apparently
doesn't protect the wearer from others.

https://www.fastcompany.com/90496717...s-banning-them


It figures that you would get it exactly beackwards.


Yep, switch it the other way.

"if you have a mask with a valve, you are protecting yourself as well as
you would be if you wore a mask without a valve. Theres no difference
in personal protection according to anything published in the CDC or
elsewhere. But if you have a mask with a valve, youre not really
protecting those around you, which is at least half of the point of
wearing a cotton mask in the first place.: