Good leather.
https://www.horween.com/articles
In case you’ve ever thought it was a bit hard to keep track of what is “good” leather and why: this is why. And it doesn’t even touch on what animal it came from, what part of the animal it is, what part of the skin it is, and how it was initially obtained and taken.
I do appreciate craftsmanship — and in any case enjoy geeking out about other people’s typically ignored expertise, every once in a while.
With apologies to vegan friends whom I know are horrified by the whole endeavor.