N95 vs P100 Respirator: Which One Should You Buy?

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N95 vs p100 respirator: the filter classes

N95 means the filter is certified to capture at least 95 percent of non-oil-based particles and aerosols, per the NIOSH rating the listings cite. P100 is a different filter class from N95, and the listings here cover N95 ones. The letter tells you oil resistance (N is not oil-resistant, P is oil-proof), and the number tells you efficiency. For laser engraving dust, which is non-oil particulate from wood, acrylic and similar materials, N95 is the class the listings here carry.

None of the four listings below is a P100. They are all N95 disposable respirators. If your work involves oil-based aerosols, look for P100 specifically; for the dry dust of engraving, the N95 models here are the relevant class. P100 respirators filter oil-based particles that would degrade an N95 filter, which is why the letter matters as much as the number.

Four N95 respirators, ranked

First, the 3M Aura 9205 (20-pack). NIOSH-approved N95 with an adjustable nose clip, sold for grinding, sanding, sweeping and bagging. The listing states a 1 year warranty, the only clear warranty term here, and notes an Assigned Protection Factor of 10. Twenty respirators per pack is the largest count here.

Second, the 3M 8511 (10-pack). NIOSH-approved N95 with the 3M Cool Flow exhalation valve, which the listing says helps direct exhaled air downward for easier breathing. Adjustable M-noseclip and braided headbands. The listing states a limited warranty against defects in material and manufacture.

Third, the BNX H95W (10-pack). NIOSH-approved N95, approval number TC-84A-9315, made in the USA. Five-layer filtration with electrostatically charged meltblown polypropylene, latex-free headbands and an adjustable metal nose piece. No warranty term is stated.

Fourth, the GIKO 1200HV (15-pack). NIOSH-certified N95 cup respirator with a breathing valve and adjustable nose clip. Fifteen per pack. The listing says “for warranty information about this product, please click here” with no term stated, so we score it as no warranty.

What the listings state about use

The BNX listing names healthcare, construction, food processing, manufacturing and other settings, and describes a flat-fold design for storage plus a 3D shape that leaves room to speak. The 3M 8511 listing names sanding, pollen, mold spores and dust particles. The 3M Aura listing names grinding, sanding, sweeping, bagging and other dusty tasks. The GIKO listing is sparse, naming only the filter class and valve. For laser work, the relevant uses are the dusty ones: sanding, grinding and sweeping around the machine.

Valve or no valve

Two of the four have exhalation valves: the 3M 8511 with its Cool Flow valve and the GIKO with a breathing valve. A valve lets warm exhaled air escape, which the 3M listing says makes breathing easier during long wear. The BNX and the 3M Aura have no valve listed. Valved respirators are for dust, not for sterile settings where exhaled air must also be filtered.

Fit and seal

A respirator only works with a seal. The BNX lists latex-free headband straps and an adjustable metal nose piece for a tight seal. The 3M 8511 has an adjustable M-noseclip and braided headbands. The 3M Aura has an adjustable nose clip and a top panel the listing says reduces eyewear fogging. The GIKO has elastic head-bands and an adjustable nose clip. Follow the fitting instructions on each listing; facial hair breaks the seal.

One more practical note: all four are disposable, so plan on a fresh respirator when the last one loads up with dust or the straps stretch. A clogged filter is harder to breathe through, which defeats the purpose.

FAQ: lasers and CNC

What is the difference between N95 and P100?

N95 filters at least 95 percent of non-oil-based particles, per the listings. The listings here are all N95. For engraving dust, which is non-oil particulate, N95 is the listed class.

Can I use an N95 for laser engraving dust?

The listings rate these N95 for non-oil-based particles such as dust from sanding and grinding. That covers the particulate from engraving wood and acrylic. They do not cover vapors or gases, so ventilate the workspace regardless of the mask.

Do I need a valve on my respirator?

A valve helps release warm exhaled air, which the 3M 8511 listing says makes long wear more comfortable. The BNX and 3M Aura have no valve. Choose a valve for comfort during extended dusty work; choose unvalved if you also want to filter your exhale.

How many respirators come in each pack?

The 3M Aura comes as a 20-pack, the GIKO as a 15-pack, and the BNX and 3M 8511 as 10-packs. All four listings describe their respirators as disposable.

Do these work with glasses?

The 3M Aura listing specifically mentions a top panel designed to reduce eyewear fogging. The BNX mentions greater compatibility with eyewear and reduced fog. The 3M 8511 and GIKO do not mention eyewear. If you wear glasses in the shop, the Aura’s anti-fog panel is worth noting.

Which one has a warranty?

Only the 3M Aura states a clear term: 1 year. The 3M 8511 states a limited warranty against defects. The BNX and GIKO state no warranty term.

Related: dust masks for laser engraving, fume extractor vs exhaust fan and our laser engraver safety checklist.