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

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 To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Send us an e-mail: [email protected]