This unusual headdress was once worn by a giant kappa alpha male. It is made from the skull of an unknown creature, decorated with feathers and painted with blood.
Wearing it not only makes the wearer more intimidating (giving a extra dice on intimidation rolls) but spending a point of willpower lets the wearer breath water for a single scene. This can be done once per day.
Naturally it would not be acceptable to wear it in polite company.