MIL-T-6284K, MILITARY SPECIFICATION: TROUSERS, EXTREME COLD WEATHER, TYPE F-1B (26-MAR-1979)

MIL-T-6284K, MILITARY SPECIFICATION: TROUSERS, EXTREME COLD WEATHER, TYPE F-1B (26-MAR-1979)., This specification covers one type of flying trousers designated F-1B.