The inner layer of structural firefighting protective pants is designed to provide protection from:

The inner layer of structural firefighting protective pants is specifically designed to provide protection from elevated temperatures. This layer is crafted from materials that can withstand high heat conditions typically encountered during structural fires, minimizing the risk of burns or heat-related injuries to the firefighter's skin. It's essential for maintaining operational safety as firefighters are often exposed to extreme temperatures while performing their duties, and this inner layer plays a crucial role in insulating the body and preventing heat transfer.

The other considerations, such as moisture, abrasions, and harmful vapors, are addressed by different layers and components of the firefighting ensemble. The outer layer is generally designed to resist moisture and abrasions, protecting firefighters from various types of environmental hazards. The ensemble as a whole includes features to mitigate harmful vapors, but its primary function is to shield against thermal exposure, which is the key aspect of the inner layer's design.