How is heat able to conduct through the thermal liner/barrier?

Heat conduction through the thermal liner or barrier primarily occurs via moisture and compression. In firefighting gear, the thermal liner is designed not only to provide insulation but also to manage characteristics like moisture and material compression that can enhance heat transfer under certain circumstances. When moisture is present, it can facilitate heat transfer due to its ability to absorb and move energy more effectively than dry air. Similarly, the compression of the material can change its properties, allowing it to conduct heat more efficiently.

Understanding these mechanisms is crucial for firefighters, as it emphasizes the importance of maintaining the integrity of their gear. Properly managed moisture levels and avoiding excessive compression can enhance thermal protection during operations, ensuring that firefighters remain as safe as possible in high-heat environments.