As the article says (see also this comment https://news.ycombinator.com/item?id=...

		exmadscientist on Dec 4, 2022 \| parent \| context \| favorite \| on: PFC bans are going to change waterproof garments As the article says (see also this comment https://news.ycombinator.com/item?id=33856967 ), that's exactly the direction they're planning to head. Given that their PE membrane isn't on the market yet, there must be some R&D issue or other, but that's life in R&D.