Gas Mask Biological Chemical M-17 U.S. Military 1960's

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is what you are bidding on: U.S. Military 1960's style Chemical Gas Mask This is in excellent condition. is what we have found on this item: In the 1960s, the United States military developed the M-17 mask that proved to be a breakthrough in protecting soldiers from biological, chemical, and radiological agents. The M-17 had no hose or external canister; air is filtered through pads of flexible material enclosed in cavities molded into the facepiece of the mask. The successor to the M-17 is the M-45, developed in the late 1990s by a California firm for the U.S. Army M17-Series Chemical-Biological Mask - Information An M17-series chemical-biological mask , when properly fitted and worn, protects against field concentrations of all known chemical and biological agents in vapor or aerosol form. Filter elements, in the cheeks of the facepiece, remove the agents from air entering the mask. When the air has a low-oxygen content, such as in tunnels or caves, or when the air has a high level of smoke mixtures, the mask will not protect the wearer. Do not use it for firefighting. It does not protect against ammonia vapors or carbon monoxide. It also is not designed for radiological protection. However, worn properly , it provides added alpha and beta dust inhalation protection, and soldiers should wear it in all known situations until read more