DUST MASK RESPIRATORS
Dust Mask Respirators come in many configurations and ratings. The primary ratings are N, P
and R. Following the letter rating is a number, generally 95,99 or 100 which relates to how
much the filter has been measured to remove of particulate matter of 0.3 microns in diameter
Dust Mask Respirator Ratings:
The first digit is a letter that corresponds to its resistance to oil.The second and third
digits are numbers that denote the percentage of particulates the respirator can filter out.
For example, a P95 respirator is an oil proof respirator that filters out 95% of particles.
Respirator Rating Letter Class
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