Guides

Gas cartridge vs combination cartridge, explained: a gas/vapor cartridge filters only gases and vapors, while a combination cartridge adds a built-in P100 filter for dust, mist and fume. NIOSH-backed hazard matrix, the best 3M gas and combination cartridges to buy, when each is the right call, and a 15-question FAQ.

Organic vapor vs acid gas cartridge, explained: OV cartridges adsorb solvent fumes like paint thinner and acetone, while acid gas cartridges neutralize chlorine, HCl and SO2 — and neither protects against the other class. NIOSH color codes, a hazard-by-hazard matrix, the best 3M cartridges to buy, when to combine both, and a 16-question FAQ.

3M 6002 vs 60922 compared: both are NIOSH acid gas cartridges for chlorine, hydrogen chloride and sulfur dioxide, but only the 60922 adds a P100 filter for acid mist, dust and fume from plating, pickling, acid-flux soldering and pool chemicals. Hazard-by-hazard matrix, buyer-by-buyer picks, compatibility, service life and a 16-question FAQ.

A research-grade comparison of the Honeywell North N75001L organic vapor cartridge and the 7581P100L OV/P100 combination cartridge. The N75001L is vapor-only; the 7581P100L adds P100 for dust and paint mist. We cover spray painting, solvents, pesticides, North respirator compatibility, change schedule and value.

A research-grade comparison of the 3M 6003 organic vapor/acid gas cartridge and the 3M 6006 multi-gas cartridge. Both cover organic vapor and acid gases; only the 6006 adds ammonia, methylamine and formaldehyde. We cover chlorine, acid gas, ammonia and formaldehyde, when to upgrade, compatibility, service life and value.

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.

A research-grade comparison of the 3M 6001 organic vapor cartridge and the 3M 6006 multi-gas/vapor cartridge. The 6001 covers organic vapor only; the 6006 adds chlorine, acid gases, ammonia and more. We cover paint and solvents, chlorine, formaldehyde, wastewater treatment and when to upgrade from a standard OV cartridge to multi-gas.

A research-grade comparison of the 3M 6001 organic vapor cartridge and the 3M 60921 OV/P100 combination cartridge. The 6001 is vapor-only; the 60921 adds P100 for dust and mist. We cover spray painting, epoxy, fiberglass and sanding, compatibility, change schedule and value to help you pick the right cartridge.

A research-grade comparison of the 3M 2091 and 3M 2291 P100 particulate filters - standard versus advanced electret media.

A research-grade comparison of the 3M 2097 and 3M 2297 P100 particulate filters with nuisance organic vapor relief. We cover what is actually different (advanced media, breathing resistance, profile), debunk the activated-carbon myth, and recommend the right filter for welding, metal grinding, woodworking, odors.

3M 6000 vs 6500 — same cartridges and protection. The 6500QL adds a Quick-Latch drop-down and Cool Flow valve. See which 3M half mask fits how you work.

ANSI/ISEA Z89.1-2014 defines three electrical protection classes for hard hats: Class E (Electrical, 20,000V AC), Class G (General, 2,200V AC), and Class C (Conductive, no electrical protection).