The Canadian gas masks have been modeled directly from the British style with side-mount screw-on canister. The gas masks have a very comfortable anti-fog mouth and nose cup that keeps the lenses from fogging up. The voice emitter makes it easier to communicate with the mask on. The gas masks effectively protect the wearers’ respiratory tracts, faces and eyes against all known chemical and biological agents (NBC). The elastic and nylon head harness terminates in a nylon pad at the back of the head making this one of the easiest safety devices to put on. The deep set round lenses provide for excellent visibility.