The OM-90 is the current service gas mask of the Armáda České republiky (Czech army). Its production started in the year 1990. The facepiece is made of bromobutyl rubber.
It's lenses are two circular, forward-looking tempered glass eyepieces optimized for optical use. It features a drinking tube system which is compatible with the camelbak system, and a center primary voice emitter. Breaking away from the previous M10 and M10M series masks, the OM-90 has a textile 5-point head harness. The OM-90 also sports a dual filter port design.
That being said, the filter(s) can be inserted on the left side, the right side, or both. Although, it is not uncommon to find the OM-90 with a free port and a plugged second one. It features an oral nasal cup and an inner rubber seal. The voice clarity through the emitter is over 95% (as stated by the maker). Filter: The OM-90 is a STANAG compliant mask, and, when issued in military kit, comes with an OF-90 (Ochranný Filtr 90) filter.
Unissued Mask, Filter, Poncho, & Carry Case (used) included.
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I wish I had known I could get a surplus mask in this condition before spending as much as I did with MIRA safety. I purchased two masks and after cleaning them up you can't tell the difference between the surplus and a new production mask. The mask still forms a perfect seal and the glass is crystal clear. The rubber is still flexible. The chemical hood / suit has no age related defects.