3M 2291 P100 Respirator Filter

3M 2291 Advanced P100 Respirator Filter Overview

The 3M 2291 (SKU 2291, by 3M) is an advanced P100 particulate filter that captures at least 99.97% of airborne particles — dust, fumes, mists, and particulate aerosols, both oil and non-oil. It is engineered as a comfort-focused, low-profile upgrade for buyers who want maximum particulate efficiency without nuisance odor media. The 2291 uses the standard 3M bayonet connection, so it fits compatible 3M reusable half mask and full face respirators with no adapters, making it a fast, reliable replacement filter for demanding particulate work.

Safety note: The 3M 2291 is a particulate filter only. It does not provide organic vapor, acid gas, ammonia, formaldehyde, chlorine, or other gas/vapor protection.

Buyers most often cross-shop the 2291 against the standard 3M 2091, the nuisance-relief 3M 2297 and 3M 2097, the hard-case 3M 7093, and the organic-vapor combination 3M 60921. The 2291 is the right pick when the hazard is purely particulate and you want advanced P100 filtration with lower breathing resistance — not a gas or vapor cartridge. Compare every option in the 3M respirator cartridges and filters collection, learn the rating system in Respirator Filter Types Explained, see where it sits in the lineup in the 3M Filter Cartridge Guide, and confirm your efficiency class with P100 vs N95. For most professional dust, fume, and mist exposures where particulate is the only hazard, the 2291 is one of the strongest filters 3M offers.

Who Should Buy the 3M 2291?

The 3M 2291 is built for professionals whose hazard is high-concentration or highly toxic particulate and who want the comfort of an advanced P100 filter for all-day wear. It is a top choice for abatement crews, welders, masons, and maintenance teams running 3M bayonet respirators.

Buy the 3M 2291 if you work around silica dust, concrete dust, mold spores, lead dust, welding fumes, or grinding dust and need true P100 (99.97%) particulate filtration with lower breathing resistance than a standard filter. It is ideal when comfort and a low-profile fit matter over a full shift.

Do not buy the 3M 2291 if your hazard assessment identifies any gas or vapor exposure — the 2291 offers no odor relief and no chemical protection.

Choose the 3M 2091 if you want the standard, lowest-cost P100 filter and breathing-resistance comfort is not a priority. Choose the 3M 2297 if you want advanced P100 filtration plus nuisance organic vapor relief for faint odors. Choose the 3M 60921 if you need real organic vapor protection combined with P100 particulate filtration. Choose the 3M 7093 if you work in wet or dirty conditions where a hard-case P100 filter survives better. When you are unsure, the How to Choose a Respirator Cartridge guide walks you from hazard to the right product.

What Does the 3M 2291 Protect Against?

In every row above, the 3M 2291 works because the hazard is particulate. P100 filtration captures particulates at 99.97% efficiency but does not provide gas or vapor protection. If a gas or vapor is present alongside the dust, you need a cartridge — see the next section.

What the 3M 2291 Does Not Protect Against

• Organic vapor
• Paint fumes
• Solvent vapor
• Acid gas
• Ammonia
• Chlorine
• Formaldehyde
• Hydrogen fluoride
• Carbon monoxide
• Oxygen deficiency
• Unknown atmospheres
• IDLH conditions

No filter or cartridge adds oxygen. Oxygen-deficient, unknown, and IDLH atmospheres require supplied air, SCBA, or another respiratory protection solution specified by a qualified safety professional. For gas or vapor hazards, select the correct cartridge using the Respirator Cartridge Color Chart and Organic Vapor vs P100.

Best Applications for the 3M 2291

3M 2291 for Silica Dust

Respirable crystalline silica from cutting, grinding, or drilling stone, concrete, and brick is a serious lung hazard, and OSHA's silica standard pushes toward high-efficiency filtration — which is exactly what the 2291's P100 media delivers at 99.97%. Its lower breathing resistance helps on long masonry shifts. Choose the standard 3M 2091 if cost is the priority and comfort is secondary. Choose the 3M 2297 if faint odors accompany the dust. Choose the 3M 60921 cartridge if a solvent or vapor is also present. See the Best Respirator for Silica Dust guide for full setups.

3M 2291 for Concrete Dust

Concrete cutting, chasing, grinding, and dry sweeping release silica-bearing dust that demands P100-level protection, so the 2291 is an excellent fit for concrete and masonry crews. Its comfort-focused media makes wearing protection all day more bearable, which improves real-world compliance. Step down to the 3M 2091 for a lower-cost P100, or step up to the 3M 2297 if curing compounds or sealers add a nuisance odor. If you spray those sealers, the dust filter is not enough — use the 3M 60921 for combined organic vapor and P100 protection.

3M 2291 for Mold Remediation

Mold remediation kicks spores and fragments into the air, and P100 filtration captures them efficiently, making the 2291 a comfortable, high-efficiency choice for abatement and water-damage restoration. Pair it with a well-fitted, fit-tested 3M respirator and control moisture at the source. Choose the 3M 2091 for a budget P100, or the 3M 2297 if musty odors or light disinfectant smells bother workers. If you apply solvent-based biocides or encapsulants that release vapor, switch to an organic vapor cartridge such as the 3M 60921. See the Best Respirator Cartridge for Mold Remediation guide for full setups, and confirm the right class in P100 vs N95.

3M 2291 for Welding Fumes

Welding fume is fine metal particulate, and P100 filtration is the preferred efficiency for it, so the 2291 suits welders who want comfortable all-day filtration. Be aware that some welding processes also generate gases (such as ozone or carbon monoxide) that a particulate filter cannot address — assess those separately. Choose the 3M 2091 for the standard P100, or the 3M 2297 for added nuisance odor relief from fumes. When a real gas exposure is identified, move to the appropriate cartridge. See Best Respirator for Welding for complete recommendations.

3M 2291 for Grinding and Sanding

Grinding and sanding metal, masonry, wood, filler, and coatings generate fine particulate the 2291 captures at P100 efficiency, while its low-profile shape keeps your sightline clear for detailed finishing work. It is a versatile default for fabrication and bodywork. Choose the 3M 2091 for the lowest-cost P100, or the 3M 2297 when faint coating odors are present. If you grind and apply solvent primers or paints, the filter alone is insufficient — use the 3M 60921. Review ratings in Respirator Filter Types Explained.

3M 2291 for Lead Dust

Lead particulate from sanding, abrasive blasting cleanup, demolition, and renovation requires high-efficiency filtration, and the 2291's P100 media is well suited to the task. Follow OSHA lead-in-construction requirements, including hygiene and decontamination practices, since respirators are only one control. Choose the 3M 2091 for a standard P100, or the 3M 2297 if paint or solvent odors are present at nuisance levels. If you use chemical strippers that release vapor, a particulate filter is not enough — choose an organic vapor cartridge such as the 3M 60921.

3M 2291 for Woodworking Dust

Fine wood dust — especially from hardwoods, MDF, and sanding finishes — is a respiratory hazard, and some species are classified carcinogens, so P100 filtration is the safer choice for serious shop work. The 2291's comfort media makes long sessions at the bench or sander easier. Choose the 3M 2091 for a lower-cost P100, or the 3M 2297 when lacquer or finish odors are noticeable but below limits. When you spray solvent-based finishes, switch to the 3M 60921 for organic vapor plus particulate protection.

3M 2291 for Industrial Maintenance

Industrial maintenance crews move between dusty, oily, and odor-prone tasks all day, and the 3M 2291's oil-proof P100 media with lower breathing resistance keeps protection comfortable across a full shift — and comfort is what drives real-world compliance. It suits pump rebuilds, conveyor service, grinding repairs, and general housekeeping. Choose the 3M 2091 if you only need a low-cost P100 for short tasks, or the 3M 2297 when faint odors are present. Step up to the 3M 60921, 3M 60922, or 3M 60926 when organic vapor, acid gas, or multi-gas exposures are identified.

Compatible Respirators for the 3M 2291

The 3M 2291 fits 3M bayonet respirators only. It does not fit Honeywell North, MSA, Moldex, GVS, or 3M Secure Click respirators. Browse all compatible facepieces in the 3M half mask respirators and 3M full face mask respirators collections.

3M 2291 vs Other 3M Filters and Cartridges

Safety reminder: The 3M 2291 is a particulate filter only. It does not provide organic vapor, acid gas, ammonia, formaldehyde, chlorine, or other gas/vapor protection.

The 3M 2291 is often the right choice when the hazard is particulate-based and the buyer wants advanced P100 filtration without nuisance odor media. The 3M 2297 is the closer alternative when nuisance organic vapor relief is desired, while the 3M 60921 is usually the better choice when both organic vapor protection and P100 particulate protection are required.

3M 2291 vs 2091

Both the 3M 2291 and the 3M 2091 are P100 particulate filters that capture 99.97% of airborne particles and share the same bayonet mount, so filtration performance is equivalent. The difference is positioning: the 2091 is the standard, value P100 option, while the 2291 is the advanced version engineered for lower breathing resistance and comfort over long shifts. If you wear a respirator for short tasks or want the lowest price per filter, buy the 2091. If your crew runs respirators all day — abatement, welding, masonry — the easier-breathing 2291 is the upgrade that improves comfort and compliance. Neither adds gas or vapor protection; both are particulate-only. For a deeper class breakdown, read the 3M P95 vs P100 filter guide.

3M 2291 vs 2297

The 3M 2291 and the 3M 2297 are both advanced, comfort-focused P100 filters with the same particulate performance and low-profile design. The single difference is odor media: the 2297 adds nuisance organic vapor relief for faint, below-the-limit odors, while the 2291 has no odor media at all. Buy the 2291 when the job is pure dust, fume, or mist and you do not want to pay for relief you will not use. Buy the 2297 when light, distracting odors — solvents, coatings, fumes — are present but below exposure limits and you want the comfort of reduced smell. Remember, the 2297's relief is comfort only; if a measurable vapor exposure exists, both filters are the wrong tool and you need a cartridge such as the 3M 60921.

3M 2291 vs 2097

The 3M 2291 is an advanced P100 filter with no odor media, while the 3M 2097 is a P100 filter that includes nuisance organic vapor relief. Both deliver 99.97% particulate efficiency on the 3M bayonet system. Choose the 2291 when you want maximum comfort and breathing ease for particulate-only work and have no use for odor relief. Choose the 2097 when faint organic vapor odors accompany welding, grinding, or sanding and you want to take the edge off the smell while still getting P100 filtration. The practical decision is simple: no odors present, pick the 2291; faint below-limit odors present, pick the 2097. Neither replaces a gas/vapor cartridge — see Organic Vapor vs P100 to confirm which you truly need.

3M 2291 vs 60921

This is a filter-versus-cartridge decision. The 3M 2291 is a particulate-only P100 filter; the 3M 60921 is an organic vapor/P100 combination cartridge that protects against both organic vapor and particulate. If your hazard is purely dust, fume, or mist, the 2291 is lighter, lower-profile, and more cost-effective. If your hazard assessment, SDS, or label identifies an organic vapor exposure — paint spraying, solvent work, coatings — the 2291 is not adequate and you must use the 60921 or another appropriate cartridge. Buyers sometimes try to save money with a filter when a vapor is present; do not. Match the product to the contaminant using How to Choose a Respirator Cartridge, and step up to the 3M 60926 for multiple gas hazards.

3M 2291 vs 7093

Both the 3M 2291 and the 3M 7093 are P100 particulate filters with identical 99.97% efficiency, but the form factor differs. The 7093 is a hard-case filter with a rigid shell that resists crushing and sheds water and debris, making it the better pick for wet, dirty, or rough environments. The 2291 is a soft, low-profile, advanced filter that is lighter and keeps your sightline clearer for close work, with lower breathing resistance for comfort. Choose the 7093 for foundry, water-blasting cleanup, or rugged outdoor jobs where filters take abuse. Choose the 2291 for general high-efficiency particulate work where comfort, weight, and field of vision matter more than ruggedness. Both are particulate-only and add no gas or vapor protection.

When NOT to Use the 3M 2291

Because the 3M 2291 is a particulate filter only, do not use it for any of the following — each requires a gas/vapor cartridge or supplied air:

• Organic vapor, paint spraying, or solvent work — use the 3M 6001 organic vapor cartridge, or the 3M 60921 for organic vapor plus P100
• Acid gas exposure — use the 3M 60922 for acid gas plus P100
• Ammonia, methylamine, formaldehyde, or multi-gas exposure — use the 3M 60926 multi-gas/P100 cartridge (a 3M 60928 formaldehyde/organic-vapor/P100 cartridge may also be specified where available)
• Oxygen-deficient, IDLH, or unknown atmospheres — use supplied air or SCBA; see supplied air respirators

No filter or cartridge adds oxygen. Oxygen-deficient, unknown, and IDLH atmospheres require supplied air, SCBA, or another respiratory protection solution specified by a qualified safety professional.

3M 2291 vs Honeywell North and Moldex P100 Filters

Buyers cross-shop P100 filters across brands, but one rule comes first: choose by respirator platform, then by hazard and comfort. NIOSH approvals apply to the tested facepiece-and-filter assembly, so you cannot mix filters and respirators across brands. The 3M 2291 fits 3M bayonet respirators only; Honeywell North filters fit Honeywell North respirators; Moldex filters fit compatible Moldex respirators. All three options below are advanced or low-profile P100 particulate-only filters at 99.97% efficiency — the platform decides which you can actually use.

3M 2291 vs Honeywell North 7580P100

The 3M 2291 is an advanced, low-breathing-resistance P100 particulate filter for 3M bayonet respirators. The Honeywell North 7580P100 is a North-platform P100 option that mounts on North facepieces. Both deliver 99.97% particulate efficiency, so the right choice is dictated by the respirator you already run. If your crew is standardized on 3M, choose the 2291; if they run North, see the Honeywell North respirator filters and cartridges range and the Honeywell North Cartridge Guide.

3M 2291 vs Honeywell North 75FFP100

The Honeywell North 75FFP100 is North's flat, low-profile P100 filter — conceptually similar to the 3M 2291's low-profile, comfort-focused design, but on the North platform. Do not cross-fit: a 75FFP100 will not seat on a 3M bayonet facepiece, and the 2291 will not seat on a North facepiece. Pick the filter that matches your respirator brand, then compare comfort and profile within that platform.

3M 2291 vs Moldex 7940 P100

The Moldex 7940 is a Moldex-platform P100 particulate filter for compatible Moldex respirators. Like the 3M 2291, it is particulate-only at 99.97% efficiency, but it is not interchangeable with 3M or North hardware. If you run Moldex facepieces, browse the Moldex respirator cartridges and filters range; if you run 3M, the 2291 is the comfort-focused P100 to choose.

3M 2291 Specifications

Helpful Buying Guides

• 3M Filter Cartridge Guide — see how the 2291 fits 3M's complete bayonet lineup.
• How to Choose a Respirator Cartridge — a step-by-step path from hazard to the right product.
• Respirator Filter Types Explained — what N, R, and P ratings and 95/99/100 efficiencies mean.
• P100 vs N95 — decide whether you truly need P100 efficiency.
• Best Respirator for Silica Dust — recommended setups for masonry and concrete work.
• Best Respirator for Welding Fumes — particulate and gas considerations for welders.
• Organic Vapor vs P100 — when a filter is enough and when you need a cartridge.
• Respirator Cartridge Color Chart — match the right color-coded cartridge to your contaminant.
• Respirator Filters & Cartridges Guide — the full filter-and-cartridge selection hub.

3M 2291 Frequently Asked Questions