3M™ Particulate Respirator 8511, N95

Distributor: eGrimesDirect
Part Number: 8511
SAP ID: 7000002056
Legacy SKU: 70070757557
Local Catalog ID: 8511
Product Number: 54343

The 3M™ 8511 respirator is a NIOSH-approved N95 mask featuring Advanced Electret Media for ≥95% filtration efficiency at 0.3 µm, paired with a patented Cool Flow™ Exhalation Valve to reduce breathing resistance and keep the interior cooler and drier. Its lightweight cup design and adjustable fit make it ideal for extended wear in hot, humid, or dusty industrial environments.

Key Features

NIOSH N95 Certified (42 CFR 84)
Cool Flow™ Valve: Polyisoprene one-way valve for easy exhalation
Advanced Electret Media: Permanently charged polypropylene fibers
Cup-Style Shell: Rigid polyester/polypropylene for shape retention
Adjustable M-Noseclip: Aluminum for custom seal and fog reduction
Braided Comfort Straps: Dual elastic polyisoprene, stapled (latex-free)
Shelf Life: 5 years (–20 °C to 30 °C, < 80 % RH)
Maintenance Free: No additional filters or cartridges required

Technical Specifications

Attribute	Detail
Filter Class	N95 (non-oil)
Filtration Efficiency	≥95 % at 0.3 µm
Filter Media	Melt-blown electret polypropylene
Inhalation Resistance	≤35 mm H₂O @ 85 L/min
Exhalation Resistance	≤25 mm H₂O @ 85 L/min (valved)
Valve Housing	Polypropylene
Valve Flap	Polyisoprene
Shell Material	Non-woven polyester & polypropylene
Headbands	Braided elastic polyisoprene
Nose Clip	Malleable aluminum
Temperature Reduction	≈4 °C cooler vs. non-valved
Shelf Life	5 years
Certifications	NIOSH 42 CFR 84, OSHA compliant

Learn More

Filtration Technology

Large particles collide with the thick outer fibers (inertial impaction), embedding themselves deep in the media
Medium-sized droplets are caught as they’re forced to follow airflow lines and sweep into fiber intersections (interception)
Tiniest aerosols zig-zag by Brownian motion until they drift onto the charged fibers (diffusion capture)
A permanently charged electret layer gives submicron particles an extra electrostatic “pull,” boosting overall efficiency
The outermost layer resists surface cake-up, so you get a longer service life before airflow becomes restricted

Cool Flow™ Valve Mechanics

A light-pressure polyisoprene flap opens as soon as you exhale, letting hot, moist air escape instantly
Rapid venting keeps the inside of the mask noticeably cooler and drier during heavy breathing
By flushing out exhaled CO₂-rich air from the dead-air space, it prevents buildup and reduces fatigue
On inhale the flap snaps closed to restore full N95-grade filtration without any inward leakage

Usage & Maintenance

Intended for one work shift only—discard at day’s end or sooner if breathing feels harder
Not suitable for oil-based aerosols, which can degrade the filter media over time
Before each use check the shell for cracks, the straps for wear, and the nose clip for proper shape
Keep stored in its original, sealed packaging in a cool, dry spot away from direct sunlight