Egyptian Gods

Atef is the specific feathered white crown of the Egyptian Deity Osiris. It combines the Hedjet, the crown of Upper Egypt, with red Ostrich feathers for the Osiris cult. The Atef crown identifies Osiris in ancient Egyptian painting. Osiris wears the Atef crown as a symbol of the ruler of the underworld. The tall bulbous white piece in the center of the crown is between two ostrich feathers. The feathers represent truth, justice, morality, and balance. The Atef crown is similar, save for the feathers, to the plain white crown (Hedjet) used in the Predynastic Period and later as a symbol for pharaonic Upper Egypt.

Article Source: Wikipedia.org