Question 1

Does It good for filter pm 2.5?

Accepted Answer

Technical Data below is from 3M Corporate:

Short Answer: 
3M N100 Mask filters out 99.97% of particles larger than 0.3-Microns (PM2.5 means 2.5-microns or larger). A 3M N100 Mask works well against cigarette smoke and smog covered cities.

Longer Answer: 
Your concern is with PM2.5. See explanation below:

The most harmful pollutant to human health is called PM 2.5, particle matter smaller than 2.5 microns in diameter that's found in soot, smoke, and dust. PM 2.5 is especially dangerous because it can get lodged in the lungs and cause long-term health problems like asthma and chronic lung disease.

PM 2.5 starts to become a major health problem when there is more than 35.5 micrograms (µg) of PM 2.5 per cubic meter of air, according to the Environmental Protection Agency. But the World Health Organizations recommends keeping yearly average PM 2.5 levels three times lower than that.

The most polluted cities on Earth have anywhere between 11 and 20 times that amount - based on the new WHO data from cities that collect it.

Hope this helps... 😁

Sincerely, 
Jacob
SurvivalGeek (YouTube)
https://www.youtube.com/channel/UCfRsUPToBXp4ZIre__dJg4A

Question 2

Is this mask effective against smoke from wildfires (in surrounding cities, not fighting the fire)? How about use while spray painting? Thanks!!

Accepted Answer

I noticed that when I smell smoke from a wildfire and then put on an N95 I can't smell smoke. So it has some effect. I carry them in my car and when I travel. But - it doesn't work with spray painting. That requires another type of filter. If I spray paint outside I use an N95 and that works if there's a gentle breeze to carry fumes away.

Question 3

Why is this unit 70% more in cost than the 3M Particulate Respirator 8210V, N95  Looks to be the same thing.

Accepted Answer

You're absolutely right.  You can visit the 3M site where it shows you all model numbers for their protective masks. Model 8511 specifically says on their website that this mask DOES NOT PREVENT VIRUS, GERM PROTECTION.   This is a description on one of 3M's sites w/ description of what 8511 which is given category on N95 (this is also not FDA approved).  product Code	8511  From 3M website:  This respirator can also help reduce inhalation exposures to certain airborne biological particles (examples: mold, Bacillus anthracis, Mycobacterium tuberculosis), but cannot eliminate the risk of contracting infection, illness, or disease
Product Color	White
Product Type	Dust and other Particles
Recommended Industry	Agricultural, Commercial Buildings, Construction, Design & Construction, Food Processing, Food Safety, General Manufacturing, Heavy Infrastructure, Industrial Maintenance, Mining, Oil & Gas, Transportation

Question 4

Is this mask reusable？

Accepted Answer

Although mentioned in other responses that it does not filter out certain viruses and bacteria, it is a good mask.  Also health authorities do not want you to use this mask as it does not filter out your own exhalations.  That being said it was the only mask I had during the early months of the pandemic.  And yes, I have used each mask over several times.  First after each use let the mask dry out for 24hrs.  Second after drying spray the inside and the outside of the mask with 70% alcohol.   Let it dry for 24hrs.   Then it should be ready to use again.  If the mask is dirty or damaged throw it out.  It was better than nothing.  During the pandemic I social distanced and stayed home only to go our for pharmacy and groceries and washed my hands and clothes.  I also would wipe down anything I brought into the home with either an 70% alcohol wipe or Clorox wipe.

ASIN	B0002YKBV2
Best Sellers Rank	#266 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #3 in Disposable Respirator Safety Masks
Brand Name	3M
Closure Type	Pull On
Color	White
Customer Reviews	4.6 4.6 out of 5 stars (16,384)
Filter Class	N95
Fit Type	Universal
Global Trade Identification Number	00051138543433, 50051138543438
Included Components	40 Pack
Item Dimensions D x W x H	5"D x 6.2"W x 8.5"H
Item Package Quantity	1
Item Shape	Rectangular
Item Type Name	Disposable Respirators
Item Weight	0.56 Pounds
Manufacturer	3M
Material	Fabric
Number of Items	1
Part Number	8511PB1-A-PS
Pattern	Respirator
Product Care Instructions	Hand Wash
Product Style	8511p10-dc
Recommended Uses For Product	Our most popular valved disposable respirator, the 3M Cool Flow Valve Particulate Respirator is equipped with the 3M Cool Flow Valve, which helps release warm, exhaled breath from inside the respirator, helping to enhance your comfort during longer jobs. This N95 respirator features 3M Advanced Electrostatic Media that enhances the capture of airborne particles and is designed for easy breathing. …
Reusability	Disposable
Size	10 Count (Pack of 1)
Special Features	NIOSH-APPROVED N95 for at least 95 percent filtration efficiency against certain non-oil-based particles and aerosols
Specification Met	NIOSH N95
Style Number	8511PB1-A-PS
UPC	051138543433
Unit Count	10 Count
Warranty Description	Limited Warranty. This 3M product will be free from defects in material and manufacture. If this 3M product is defective, your exclusive remedy shall be, at 3M's option, replacement of the 3M product or refund of the purchase price of the 3M product. This warranty gives you specific legal rights, and you may have other rights which may vary from state to state, or country to country. To obtain war…

3M Particulate Respirator 8511 N95 with 3M Cool Flow™ Exhalation Valve

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