OKZK cap
The OKZK cap is a balaclava-like khaki field cap that was issued by the Soviet Army as part of the NBC suit OKZK (Russian: общевойсковой комплексный защитный костюм, lit. 'combined arms complex protective suit'). == Structure == The OKZK cap is made of a thick cotton fabric that includes a layer of fabric impregnated with a chemical absorbent.