What is the purpose of the moisture barriers found in structural firefighting PPE?

The purpose of moisture barriers in structural firefighting personal protective equipment (PPE) is to keep liquids and vapors from reaching the skin. These barriers are critical in ensuring the firefighter's safety and comfort by preventing hazardous materials, such as water, chemicals, and harmful vapors, from penetrating the protective layers of the gear.

Moisture barriers are designed to be waterproof while still allowing for some breathability, helping to manage the thermal environment around the firefighter. This is essential as it protects against direct exposure to harmful agents encountered during firefighting operations, which can cause serious skin injuries or contamination.

The function of the moisture barriers supports the overall effectiveness of the PPE, emphasizing the importance of maintaining safe operational conditions in a high-risk environment.