What is a gas mask filter made of?

A gas mask filter typically consists of multiple layers designed to remove harmful substances from the air. The primary materials used include activated carbon, which adsorbs toxic gases and vapors, and particulate filters that trap solid particles. Some filters may also incorporate chemical agents to neutralize specific threats, such as biological or chemical warfare agents. The combination of these materials helps ensure the filter effectively protects the wearer from a variety of harmful contaminants.