INHERENT FABRIC means that the FR protection is an aspect of thread used within the fabric of the garment, as opposed to the garment fabric being treated topically. Inherent fabric provides exceptional flame resistance and thermal protection. Below is a description of two different types of inherent fabric. Look for their inherent classification symbols in our catalog.
Inherent B refers to thread that has been washed with fire resistant treatment prior to being woven into fabric. Inherent B FR fire resistant fabric can be found in many of our Carhartt products.