What is the primary function of the gas mask?

The primary function of the gas mask is to protect the face, eyes, and respiratory system during a Chemical, Biological, and Radiological (CBR) attack. This is crucial for maintaining the health and safety of personnel in environments where hazardous substances may be present. The gas mask is designed to provide a sealed barrier that blocks the entry of harmful agents, safeguarding the wearer from inhaling toxic substances that could cause serious harm or incapacitation.

While visibility in smoke, insulation from cold weather, and filtration of some harmful chemicals are functions that might be related to personal protective equipment, they do not encompass the primary and critical purpose of a gas mask in the context of CBR threats. The emphasis is placed on respiratory protection and overall facial coverage to ensure that life-supporting systems remain functional in contaminated environments.