PFAS Lawsuits and Bans Force Rework of Waterproof Breathable Fabrics

Legislation targeting PFAS is forcing waterproof breathable apparel manufacturers to replace the chemistry that has underpinned the category for decades, according to a new report from Textiles Intelligence. The report, titled "Waterproof breathable fabrics: changing legislation is driving innovation," charts both the scramble for alternatives and the performance gap they still carry.

PFAS — per- and polyfluoroalkyl substances, widely described as "forever chemicals" — have held a dual role in outdoor apparel. They form the core of waterproof breathable membranes and supply durable water repellent (DWR) finishes on fabric surfaces. The compounds block water penetration while allowing moisture to escape, keeping wearers dry and comfortable in harsh weather.

Mounting consumer concern and evolving legislation have now forced the industry to reconsider that reliance. The compliance pressure is traceable to a growing body of national and regional PFAS restrictions, and suppliers must treat reformulation as a regulatory obligation rather than a marketing choice.

What are suppliers replacing PFAS with?

The report highlights significant advances in alternative membranes and finishes developed without PFAS. Manufacturers are increasingly turning to bio-based polyurethanes and membranes made from fluorine-free materials. These options remove the restricted chemistries at the membrane tier of the supply chain, the layer that determines waterproofness and breathability performance.

W L Gore & Associates has introduced the highest-profile substitute so far: a membrane made from expanded polyethylene (ePE). It replaces the company's original expanded polytetrafluoroethylene (ePTFE) membrane, which is a type of PFAS. Gore's move signals how leading component suppliers are adapting to the new legislative environment while defending performance claims.

Takeaway: the fluorine-free shift is now visible at the component-supplier tier, not just in brand marketing.

Does the performance still match?

Not yet, according to the report. Many suppliers continue to face challenges replicating the established balance between waterproof protection and breathability that PFAS-based technologies delivered. The difficulty scales with the end use.

Performance requirements differ depending on the garment's intended use, the report notes:

• Clothing for prolonged exposure to severe weather demands higher water resistance.
• Products for daily wear face lower thresholds, easing the transition to alternative chemistries.

That split means technical and expedition-grade garments — the most demanding sourcing categories — will prove hardest to reformulate at equivalent specs.

Takeaway: buyers of severe-weather product should expect longer qualification timelines for non-PFAS inputs.

What happens to demand?

Textiles Intelligence expects a "healthy rate" of growth in global demand for waterproof breathable fabrics in the coming years. Consumers continue to prioritise outdoor activities, sustaining order volumes across the category. The growth outlook sits alongside, not despite, the chemistry transition.

As legislative measures against PFAS expand, the report expects manufacturers to face ongoing pressure to refine and improve non-PFAS alternatives to meet brand and consumer expectations. Suppliers that cannot close the performance gap risk losing placements as brands reformulate their ranges.

The sourcing decision this forces is immediate: apparel brands and their tier-two fabric and membrane suppliers must audit which PFAS lines their current specifications depend on, qualify fluorine-free alternatives against their weather-performance tiers, and build compliance documentation before further restrictions tighten.