After I Buy 3M Particulate Respirator 8233, N100I recommend the 3M Particulate Respirator 8233, N100(1 for $9.77) over the SAS Safety 8641 P100 Particulate Respirator (2 for $13.18), both sold by Amazon because :
(1)My experience shows that the filtering media outlast the straps, which wore out and no longer stretch to seal the mask to the face.
(2)3M's 2 straps stretch better and last longer than those for "SAS". You put on the "SAS" mask on the face and then pull the 2 straps through the holes to tighten the seal each time. You do not have to pull the straps through the holes on 3M mask each time unless your face is sweaty (slippery). The 3M straps are much more elastic and stretchable.
(3)The straps on "SAS" mask wore out quickly and stopped stretching. 1mm long pieces of white rubber(?) fall off the SAS straps. The straps on 3M last longer and stretch better.
(4)You get many more uses out of the 3M mask because the straps last longer than those of SAS mask.
(5)The 3M mask is a little smaller and fits my face better than the SAS mask.
(6)Face sweats badly wearing the mask in hot weather.
3M's black sweat-proof soft silicone-like gasket provides a better seal. But it slips on a sweaty face requiring pulling the 2 straps tight to keep it from slipping downwards to the mouth and pinching the nose.
SAS's grey sweat-absorbent cloth-like gasket does not slip as bad as 3M on a sweaty face.
(7)N100 masks filter at least 99.97% of non-oil airborne particles. Not for use against oil particles.
P100 masks filter at least 99.97% of oil and non-oil airborne particles.
I recommend the P100 over the N100 masks because they can be used against both oil and non-oil particles.
It is much cheaper to replace the masks or respirators than your lungs. Many people die
while waiting for lung transplant which cost $400000 or more for one lung. Plus you have to take immunosuppressive drugs regularly to prevent rejection of the transplanted lung.
It takes time to research these information.
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