Actually, bike commuting is ine of the hardest scenarios for GoreTex in my experience. Biking in general tends to put Your heart rate pretty high. It depends o

Actually, bike commuting is ine of the hardest scenarios for GoreTex in my experience. Biking in general tends to put Your heart rate pretty high. It depends on intensity of course, but a brief 30-60s sprint to overtake someone or clear a traffic light will take You from a comfortable aerobic zone well into anaerobic. That means "a lot" of sweat eventually. Walking/ hiking does that a lot less. At the same time, on a bike commute You need durability under mechanical stress (backpacks with laptops can get heavy real quick). Aaaand on top of that, ideally it needs to be reasonably cheap (or last for decades) to be economically viable. Personally, for bikepacking, I found that the only Goretex that works is the Shakedry membrane. This is their most barebones slimmed-down membrane. Super breathable, great water / wind resistance, but it's so ligh You look at it sideways and it tears. Definitely can't wear a backpack with that one. On the other hand, my hiking jacket is a 3 layer laminate Goretex Pro that I've used for about 8y now with 25+kg backpacks. Great, durable, waterproof, but You are right- it's not breathable enough for bike(unless You open up all the pit zips, which kinda beats the purpose of a waterproof membrane).