ELI5 Gore-Tex - what makes Gore-Tex so special?

ELI5 Explain Like I'm 5: Bite sized answers to stuff you should know about - in a mini podcast

What is it and why is Gore-tex so special? Aren’t there other materials that are just as waterproof? How was it discovered? Why does proper care of Gore-tex jackets involve the tumble dryer?

... we explain like I'm five

Thank you to the r/explainlikeimfive community and in particular the following users whose questions and comments formed the basis of this discussion: leonagano, kanobe24, oliverhazzzardperry, ligrgame and bassonb

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