BDO Codex

Link: Ferocious Leather

Description of the problem:
"Same types of leather x2 (Soft, Tough, Hard, Thin) Processing Material: Copper Ingot x4 + Bronze Ingot x4 + Processed Leathers of the same type x2"

It says Leather, but it is actually Hide that is needed, hence the Soft, Tough, Hard, Thin description

Thanks for the report. It's a mistake in the in-game description. Once it'll be fixed by PA, it'll be fixed on the site as well.
Please report it to the official support of the game.