What is a key function of the moisture barrier layer in turnout gear?

The moisture barrier layer in turnout gear plays a crucial role in firefighter safety by preventing moisture transfer to the skin. This is essential because when firefighters are exposed to wet environments, their turnout gear can become saturated with water, which can lead to a significant risk of hypothermia or skin irritation. The moisture barrier works by blocking water from entering the garment while allowing sweat vapor to escape, thereby maintaining comfort and temperature regulation during operations.

While thermal insulation, visibility, and flexibility are important considerations for turnout gear, the primary purpose of the moisture barrier is specifically to manage moisture and protect the wearer from being adversely affected by external wet conditions. This function is vital for maintaining the overall effectiveness and safety of the gear during firefighting operations.