A scientific invention that shows up in chapter 180. The first time we get a glimpse of these rubber boots is on chapter 173, where Senku and Xeno are both imagining all the inventions they can make now using rubber as a resource.
The factory method for making rubber boots is as follows, a rather tedious process:
However, seeing as they are in a forest, and quite literally in the Stone Age, such a process would be impossible. So, how would they have made these rubber boots?
Considering how flexible rubber is, they probably made a mold out of wood that looks like a leg. They would then proceed to make a mold for the bottom of the sole. The wooden leg would then be dipped in latex (Liquid rubber), and then the bottom of the sole would be attached afterwards.
Of course there would be an issue arising in having to make a different size of boots for everyone (Considering the height differences), but that would not take too much time to figure out.
Therefore by the end, they would have a fitting scientific invention to go through the forest.
Why exactly do they need rubber boots while wading through the Amazon? Well....
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