Guides

A research-grade comparison of the 3M 5N11 (N95) and 3M 5P71 (P95) particulate prefilters. The 5N11 covers non-oil aerosols only; the 5P71 is oil-proof and handles oil mist and overspray. We cover spray painting, sanding, fiberglass, use with the 501 retainer and 6001 cartridge, and which prefilter to buy.

3M P95 vs P100: Both P95 and P100 are oil-resistant particulate filters under NIOSH's classification. P95 captures at least 95% of airborne particles. P100 captures at least 99.97% and is color-coded magenta. For many general industrial applications, P95 is sufficient.