Humans have worked on ways to make garments water resistant almost since they started to wear them. But figuring out how to manufacture a raincoat using rubber was a big breakthrough that took centuries.

Research:

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Britannica, The Editors of Encyclopaedia. "Charles Macintosh". Encyclopedia Britannica, 21 Jul. 2022, https://www.britannica.com/biography/Charles-Macintosh
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