Hunt Lahom Clan Combatant in Lahom Post and collect Wool Leather. Bring them to Thomas Klasnici in Epheso Forge Use your quest tracker to see your progress.
Thomas Klasnic: You're back. It's hard pulling their claws, huh? Thomas Klasnic: You're amazing. Other Aitan have a hard time here. NakanoAzusa: I had a hard time, but I managed to get through NakanoAzusa: with my excellent weaponry. Thomas Klasnic: Yes, it looks like you take special care... Thomas Klasnic: Will you show me later? I would like to take a look NakanoAzusa: Sure. Once I am fully equipped. NakanoAzusa: What do I need next? Thomas Klasnic: Time to make the overcoat. Bring me the wool leather Thomas Klasnic: that Lahom Clans use to make clothes. Thomas Klasnic: You can get it from Lahom Clans roaming around.
Reminder Dialog
Thomas Klasnic: The leather the Lahom Combatants use is very tough. NakanoAzusa: So, there are different kinds of clothes for monsters too. NakanoAzusa: I never knew.