- REDEFINE CLEAN: Why PFAS-Free Performance Materials Require a New Approach to CarePFAS-free waterproof breathable systems represent one of the most important shifts in performance textiles. But with that shift comes a critical and often overlooked reality: The way we clean these materials has not kept pace with how they now fail. A New Failure Mode: Contamination, Not Construction Historically, PFAS chemistries provided more than water repellency.… Read more: REDEFINE CLEAN: Why PFAS-Free Performance Materials Require a New Approach to Care