TIL of shell cordovan, a rare "leather" that isn't made from animal skin, but connective tissue from a horse's buttocks. Shoes made from them are waterproof, don't crease, don't require polishing, and can last indefinitely. Only two major tanneries make them.
https://stridewise.com/why-is-cordovan-leather-so-expensive/
#til #todayilearned
