At least some of the trick to masks is static charge of the fabric grabbing the virus to cause a roadblock as other virus latch onto each other in clumps too big to get thru the mesh of a material. Like dirt on a window-screen. Three layers should create a static charge n each layer just by rubbing against each other, and why wouldn’t it be good enough for a quick grocery store trip as long as you didn’t have to stand in long lines? Maybe not so much a single layer silk scarf.
limited, indirect evidence isn’t enough evidence to discourage people from wearing something that helps block two of three critical facial areas.
Yeah, I posted that about the masks just out of interest, but I still personally believe something is better then nothing.
Hmmm. I wonder if anyone has looked at which materials create the most static charge, and whether it is maintained in high humidity (breath) conditions. I somewhat doubt the latter, as such a charge is not a permanent (or semi-permanent) “electret” effect. (Electret microphones work ok even though obviously receiving a lot of hot humid breath in use.)
I’d think that surely by now someone has looked at what materials are best for homemade masks.
Of note, breathing through flannel (shirt material) in the crook of one’s elbow seems to almost entirely remove most odors and scents. (No to be gross, but, compared to a virus, how big are the “particles” floating around after one stinks up the bathroom? Or passes gas. Or what’s the final particle size of the air freshener aerosol spray used to combat that?)