There has not been robust validated research conducted on the effects of station wear while worn under a NFPA 1971, Standard on Protective Ensembles for Structural Fire Fighting and Proximity Fire Fighting protective ensemble (aka “bunker gear”) in a fire and heat environment. The fire service is generally unaware of the risk that is associated with the use of non-certified NFPA garments, including synthetic fabrics, while worn as station wear garments under bunker gear. The second leading cause of fire fighter injuries in the United States is exposure to heat and smoke. The scope of NFPA 1975, Standard on Emergency Services Work Clothing Elements specifies the requirements for the design, performance, testing, and certification of non-primary protective work apparel and the individual garments comprising work apparel. The standard also specifies the requirements for the thermal stability of textiles used in the construction of work apparel.