The GP-5 is a single-filter gas mask developed by Soviet Russia during the cold war. It features an SHM-62u face piece with sealed glass eye pieces and a rubber exterior shell that can stretch to fit most head sizes. The GP-5 filter was developed to protect civilians from toxic agents, radioactive dust, and bacteriological aerosols in the event of nuclear fallout. This unique piece of Cold War memorabilia is still functional and popular among survivalist and collectors. The mask and filter comes with a standard issue olive drab canvas carrying bag and anti-fogging lens inserts.