Cotton Cowl

Body, item level 15. Equip level 15, all classes.

From 75 Over the Rails and 4 more quests.

From quests

75 Over the RailsChoose one of 5
79 Call of the SeaChoose one of 4
68 Trial by WaterChoose one of 5
75 Call of the SeaChoose one of 4
72 The Threat of SuperiorityChoose one of 5

Cannot equip gear to head.

Other databases

Eorzea Database (the official one, on The Lodestone)
Console Games Wiki
Garland Tools (vendors, crafting, drops)