Feather

Source: npc/quests/newgears/2004_headgears.txt

1. In the Geffen headgear line, find Mike (Party Hat branch).
2. Turn in Party Hat materials: Santa's Hat x1, Oil Paper x100, Slick Paper x100.
3. After successful craft, NPC gives leftover bonus items.
4. Bonus line is getitem 949,10.
5. So you receive Feather x10 as extra reward in this branch.