The number in a rating tells you the minimum amount of airborne challenge particles the mask protects against: an N95 mask keeps out at least 95% of particles b

The number in a rating tells you the minimum amount of airborne challenge particles the mask protects against: an N95 mask keeps out at least 95% of particles but isn’t oil resistant, and a P100 mask is oil proof while protecting the wearer from at least 99.8% of particles. (AKA just a better mask). It's a real bummer to hear such comment - why spread this? P100 Approved, NIOSH's highest rated filtration efficiency in a filtering facepiece respirator. It is just a higher rating. "P100's are significantly harder to breath in" <- not at all! You should try one - they breath great. They are meant for workers to wear all day. They even have a nice leather like seal making it easier to have proper seal. Also! They are perfect for a quick trip to the grocery store or standing on a bus. ALSO! The screw on versions are great but they are MUCH heavier and impossible to put in a pocket so they are not practical at all. Nothing about your comment was accurate :(