For years, Gore-Tex has been the dominant waterproof-breathable membrane. W.L. Gore, the inventor of the product category, also set the standard aligned on the properties of expanded polytetrafluorethylene (ePTFE), its key raw material. That was before per- and polyfluoroalkyl substances, or PFAS, the infamous ‘forever chemicals’, became so prominent in nature, cookware and clothing. The outdoor industry has been phasing out the unwanted chemistry in water repellent finishes. Although no ban on PTFE has been instated, many see it as too close for comfort, and increasingly avoid its use. 

Share this story: