[FrankoDelMar]

I do hate fast fashion, but I can think of many exceptions where natural fibers won't cut it. There is no natural fabric product on the market that can properly replace lightweight, waterproof clothing. Waxed cotton is waterproof but heavy. Rubber is not breathable. Technical synthetics like Goretex have its issues (low durability, high cost, coated with PFAS), but it sure beats getting hypothermia.

[ninininino]

It's a rare exception that natural fibers won't serve. Alaska, Arctic circle, Antarctica, disaster prep.

You don't need lightweight waterproof clothing, you just like it. Getting a little sweaty under a non-breathable fabric or getting wet but staying insulated with wool will be just fine. Umbrellas are great as well.

What beats lightweight breathable fabric is not desecrating the planet.

[latentcall]

People will make all kinds of excuses as to not impose any minor inconvenience to themselves, even if it means making species go extinct and killing the planet.