Per- and polyfluoroalkyl substances (PFAS) comprise a class of man-made toxic chemicals that have been used in thousands of consumer and industrial products and processes. There is heightened concern of its use in the fire service due to the multiple potential routes of exposure that firefighters experience. PFAS-based materials have been used in firefighter gear as well as in aqueous film-forming foams. Following pressure from firefighters, the fire service industry has transitioned to now offering outer shell and moisture barriers that are not manufactured with PFAS. As with any major change to protective clothing, it is critical to assess the differences in performance of the new gear and determine any limitations that may need to be considered. In this webinar, R. Brayn Ormond, PhD, will provide updates on research efforts to better understand the risk and extent of PFAS exposure to firefighters from their gear and then provide a comprehensive comparison of the effectiveness of PFAS-treated and newly available non-PFAS-treated turnout gear in both new and aged conditions. This webinar is sponsored by ESO.