Why does Gore-Tex fail to be both breathable and waterproof simultaneously?

Question

What is the reason why Gore-Tex jackets cannot possess both breathability and waterproof capabilities at the same time?

Answer 1

Gore-Tex is both waterproof and breathable, but because of its structure, it is restricted to performing either of the functions at a single time. The breathability rather of the fabric baffles relies on the fact that the outer layer does not get wet. If the outer layer is DWR-treated and becomes sodden, moisture vapor gets trapped and condensation forms inside the jacket, resulting in the wearer being wet from the interior. DWR is not very efficient and hence, needs to be replaced; this wear condition is popularly known as 'wet-out'. The situation is made worse in high humidity environments where the jacket is unable to draw in fresh air.

Comments

I found out in the 90’s when I was a long distance runner that Gortex didn't breathe very well. Since then I've used Gortex drysuits when I've been whitewater kayaking and even when I've come out of my boat & fully in the water they've kept me dry but if the weather is warm then sweat can definitely build up.

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I think it even worse that stated: If you have Gortex boots even on a low humidity warm day, the rate you create moisture overwhelms the silly slow rate the gortex can breath. You might as well be wearing plastic bags on your feet if you want to ford a stream. It is completely worthless.

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Gave up on goretex boots years ago.   Oh and pit zips are the bomb!

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Wool for warmth, oilskin to keep you dry. There's a reason that's what farmers wear.

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Well, it's breathable for the days it doesn't rain, and it protect from water the days it rains, it's not that bad.