CZECH ADULT GAS MASK FILTER ONLY

The OM-90 is the current service gas mask of the Armáda České republiky (Czech army). Its production started in the year 1990.

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.
Filter: The OM-90 is a STANAG compliant mask, and, when issued in military kit, comes with an OF-90 (Ochranný Filtr 90) filter.