MSA Flexi-Filters N95 Organic Vapor Pads
MSA Advantage 818347 Flexi-Filters provide N95 particulate filtration with nuisance-level organic vapor and ozone relief. These replacement pads fit approved MSA Advantage respirator configurations and are packaged as two filters. Their flexible, low-profile design accommodates other workplace PPE. The facepiece is sold separately.
MSA / 818347
MSA818347
N95 — not resistant to oil
2 replacement filters
Nuisance organic vapors and ozone
Approved MSA Advantage assemblies
Key Features
- Swept-back profile helps maintain visibility.
- Lightweight filter pads offer low breathing resistance.
- Finger tabs assist installation and removal.
- Low-profile construction fits beneath welding hoods where the complete respirator is appropriate.
Common Uses & Applications
Potential uses include assessed non-oil particulate exposures in manufacturing, sanding, grinding and maintenance. Welding requires evaluation of both particles and gases. These filters are not a blanket recommendation for spray painting, solvent handling or confined-space entry. Select protection for the specific exposure, not simply the task name.
What N95 Means
The NIOSH filter classification guide defines N95 as at least 95% particulate filtration under test conditions. The N designation means not resistant to oil. This rating describes filter performance; it does not guarantee the same protection for every wearer. Correct assembly, facepiece fit and a good seal remain essential.
Nuisance Vapor Relief: Important Limits
MSA defines nuisance concentrations as not exceeding the OSHA permissible exposure limit or applicable government limit, whichever is lower. The 818347 is not NIOSH approved for organic vapor or ozone protection. Where gas or vapor protection is required, use an approved system selected for that contaminant. These filters do not supply oxygen and must not be used in oxygen-deficient or IDLH atmospheres.
Respirator Selection and Safety Standards
OSHA 29 CFR 1910.134 requires an appropriate respiratory protection program for required workplace use, including medical evaluation, fit testing for tight-fitting facepieces, training and maintenance. Verify the facepiece/filter combination against MSA instructions and its approval label. Perform a user seal check each time the respirator is donned.
Do not select this N95 filter for asbestos abatement. OSHA’s general-industry asbestos standard requires HEPA filters for powered and non-powered air-purifying respirators used under that standard.
Manufacturer Documentation
MSA Flexi-Filter manufacturer bulletin (PDF) lists 818347 and its nuisance-relief limitations. Follow the product instructions for use, inspection and replacement.
FAQ
Is 818347 the same as the P100/OV 818343?
No. The 818347 is N95; 818343 is P100. They have different particulate efficiency and oil-resistance classifications.
Can these replace organic vapor cartridges?
No. Nuisance odor relief does not establish approved organic vapor protection.
Will these fit any respirator?
No. Use only the combinations identified in MSA instructions and the applicable NIOSH approval label.
