Filters inside (P3 HEPA filter inside)

@Vitaliy....I had to wear my n95 gel lined for an hour and a half at the bank. It's very hot. I'd prefer to stay home ! A full mars mask would give me claustrophobia. I'll go live in the mountains before I'll become accustomed to this crap ! And per your "how you catch the virus....remember that dr david price er doctor video where he said the exact opposite....that most people were getting it by touching . And I remember reading about wuhan doctors saying the eyes were a big contagion point. So we can only assume we can catch it just about every way there is.

@jleo....I don't understand how a surgical mask , which isn't form-fitting to the face, would protect the same as an n95. Doesn't make sense. When I lightly blow with my mask on, I feel no current escaping. That can't be true with a surgical mask, even when they have some type of strip to bend to the shape of the nose. When someone is inhaling a percentage of air will be drawn in around the edge. Here's an article on the different types of n95. Valved performed better.... https://www.quora.com/Is-an-N95-mask-with-a-valve-on-it-better-than-one-without ...the person that invents an efficient, light, comfortable and reusable mask at a reasonable price will get rich. Maybe 3d custom printing with ?...oops, someone's already there... https://copper3d.com/hackthepandemic/

@Vitaly....how about how they make hollywood prop masks, where a mold is taken of your face, and only a filter ring is inserted. This could allow a smaller mask that only covers the mouth and nostrils. Or maybe just a tiny nostril mask and breath exclusively thru the nose while using ? Life can't return to any sense of normalcy with everyone dressing up to go scuba diving.

ny telling frontline medical staff they will have to work w/o ppe.... https://www.nydailynews.com/coronavirus/ny-coronavirus-protective-equipment-ppe-hospitals-memo-20200403-yfziltd3bfewjkptunzsf7cmee-story.html .... I'd quit, but maybe they'll be laid off first.... can I use "unbelievable" too often ? ....https://www.nytimes.com/2020/04/03/us/politics/coronavirus-health-care-workers-layoffs.html

@kurth

I made separate topic at http://www.personal-view.com/talks/discussion/23749/coronavirus-masks-and-respirators-discussion

Good article on filtration

https://multimedia.3m.com/mws/media/409903O/respiratory-protection-against-biohazards.pdf

Simple masks efficiency

The masks VK is posting are indeed the best route. Honeywell makes very good ones with very soft silicone for about $40USD with replacement cartridges about $2 - $4 for a set of two. Cheaper than n95 in the long run, and if you put it on right you will know, as you will feel the suction and hear the pressure release on exhaling. Sorta like Darth Vader. The thing that makes these so good beyond typically better filtration is putting the cartridges away from your mouth means they stay dry and don't act as incubators for viruses. The good ones have a sorta diaphram (dual on some) that allows your breath to come out instead of going back out through the filters. Just be aware when you wear it long enough it will drip from the diaphram, so if you are in public, a hanky or something to wipe your drips would be considerate, and obviously safer for others around you if you were sick. Honestly good respirators are more comfortable than N95 as they do not slip around. It is probably worth mentioning if you ride a bike or do similar activity you want to slow down as it is hard to get as much air, and at the very least it will make you winded easier and give you a headache. Worst case, you pass out.

On masks/respirators fitting

Instead of making hrrrid tracking apps, both Apple and Google needed to make 3D face scan app so oyu could get perfect mask/respirator in nearest goverment center (or shipped to you at home).

Such apps are not hard (as they exist, as well as algos) and 3d scan can be done using usual front camera (but you need to turn you had slowly).

For my job, I have a 3m face-shield mask, and give it 8/10 stars. It is pretty comfortable and can make a good seal. Facial hair can undo the seal pretty easily though, but that shouldn't be a big deal with covid; it's more a hazard from noxious gas or microfine dust

That's because a higher rated respirator are the tyvek hood types with forced or supplied air that cost a whole lot more. My job has those also and facial hair are not a problem. Again, they are higher level/cost