Answer:
   
   A kittel is a white robe worn in the synagogue on such major festivals
   as Rosh Hashana and Yom Kippur. The rabbi wears it, as does the
   cantor, the blower of the shofar, and male members of Ashkenazi
   congregations. Before a Seder dinner in traditional households, the
   leader of the Passover seder dons a kittel, and in Orthodox
   communities the bridegroom wears it at his wedding. Pious Jews use the
   kittel as a burial shroud.