U.S. Military issue M40/42 Series Protective Mask (GAS MASK) The M-40 Full Facepiece has been used for years by U.S. Armed Forces all around the world. This facepiece has been NIOSH-approved with the 3M™ Cartridge FR-C2A1 or 3M™ Cartridge FR-64 for acid gases (including chlorine), CN, CS, and P100 particulate filter. The FR-C2A1 cartridge meets [...]

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