Guides

7506N95 vs 7506N99: both non-oil prefilters; difference is 95% vs 99% efficiency. When N99 is worth it and when to skip to P100 instead.

7506N95 vs 7506R95: both 95% prefilters; the only real difference is oil resistance. Which Honeywell North prefilter fits your job site.

7506N95 N95 prefilter vs 7580P100 P100 filter, both particulate-only. When N95 is enough and when you need P100 for oil, silica or lead dust.

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.

P100 and N95 are both NIOSH particulate filter classes, but P100 delivers 99.97% efficiency vs N95's 95%, and is oil-proof. For silica, lead, asbestos, mold, and oily environments, P100 is the correct choice. This guide compares P100 vs N95 for every major job type including concrete, woodworking, and drywall.

Respirator Filter Types Explained: NIOSH certifies nine particulate filter classes under 42 CFR Part 84. They follow a two-axis system: letter = oil resistance (N = not resistant, R = resistant up to 8 hours, P = oil proof) and number = filtration efficiency (95 = 95%, 99 = 99%, 100 = 99.97%).

Best N95 Respirators 2026: Our top picks for 2026 are the 3M Aura 9205+ (best overall), the Moldex 2200 (best for all-day wear), and the Honeywell DF300 (best for industrial work). Read on for the full breakdown.