Warning-33-512 Filters listed in this article are known to contain materials hazardous to health
Exercise caution when handling and storing.
Refrain from using these filters.
Seek medical advice if you have any concerns.

The MIA2-I-I was developed for use by noncombatants working in civil defense[1] and individuals in U.S. Army-designated "target areas." The MIA2 was produced by the U.S. Office of Civilian Defense (OCD) with a $29,000,000 grant.[2] The mask was designed by Randolph Monro in 1942, and the patent was published in 1944. The design influenced future gas masks developed by the U.S.D corporation and Scott Aviation. [3]

The mask is incredibly simple, as it was meant to be mass-produced. The facepiece consists of rubberized fabric, celluloid eyepieces, a C8 exhale valve and an elastic six-point head harness. The M2-2-1 small child sized mask has a singular large celluloid eyepiece, unlike the larger sizes. The filter's casing is made of aluminum with instructions on use of the mask. The filter's contents are incredibly primitive, as most of the filtering material is asbestos and activated carbon.

A Small Child sized M2-2-1 noncombatant gas mask. Notice the large singular eyepiece instead of the two circular eyepieces like the larger sizes and the prominent exhale valve under the eyepiece.

The development of the MIA2 began with the three MI-I-I noncombatant gas masks around 1941, each one is very similar to the MIA2 in design but they all use the MIV button type exhale valve rather than the C8 exhale valve. The MI-I-I noncombatant gas masks entered much smaller scale production, and as a result are commonly thought of as experimental versions of the MIA2-I-I.

A majority of the MIA2s produced were never issued, and were redistributed through the surplus market.[4]

In Popular Culture Edit

In the semi-popular Fallout 4 Mod, Gas Masks of The Wasteland, the MIA2-I-I Gas Mask appears as an apparel and survival item, though it is improperly shown to have threaded and removable filters.

References Edit


Gallery Edit

Instructions of M1A2-1-1 filteration canister

M1A2-I-I canister instructions

M1A2-1-1 inside bag

M1A2-I-I inside air-raid warden issued bag


M1A2-I-I face-piece

M1a2-1-1 outer inhale valve

Outer angle of the intake valve of the M1A2-I-I

M1a2-1-1 inside filter closeup

Closeup of filteration canister of the M1A2-I-I from the inside

M1a2-1-1 inside

Inside of M1A2-I-I face-piece

M1a2-1-1 exhale valve

M1A2-I-I exhale valve

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