The outer layer is what I was referring too - you're right, it isn't a spray on coating and it isnt all goretex branded. The polymer is pretty durable, but it

The outer layer is what I was referring too - you're right, it isn't a spray on coating and it isnt all goretex branded. The polymer is pretty durable, but it breaks apart eventually. It goes into the water eventually when washed. The instructions for washing some of these jackets explicitly say that they wash away. Relatively, this supposed to be negligible compared to the runoff of other industrial uses at least.