Modern gore Tex (and similar) shell jackets often are marketed as being 2 or sometimes 3 layer construction with the Gore Tex membrane being one of the layers. Often the outer layer isn’t actually waterproof and can soak through. If gore Tex is the main functional layer why does there have to be extra material layers facing the elements?
In: Engineering
Because the waterproof membrane is roughly the same as Teflon tape, and has all the resilience of tissue paper, but is also the main expense in the jacket.
The old paclite was about as minimal as they could go, and they discontinued it because it just wasn’t durable
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