Why does the Torah write "for honor and for glory" specifically in connection with the Migba'os?
What was the difference between the "Migba'as" of Kohen Hedyot's and the "Mitznefes" of the Kohen Gadol?
Rashi: They were one and the same.
Ramban (on Pasuk 31): The Mitznefes was a kind of turban that wound around and around the Kohen Gadol's head. The Migba'as spiraled upward. 1
Oznayim la'Toah: It was wide at the bottom and narrow on top (like the hats worn in the middle ages).
Riva citing R. Eliyahu: A Kohen Gadol's is called Mitznefes, for it is like a mere Tzenif (loose turban), since he cannot be Holem it (make it taut). R. Tam of Orleans - a Kohen Hedyot can be Holem it in back, but not in front, due to his Tefilin. A Kohen Gadol cannot be Holem it even in back, due to the threads that hold up the Tzitz. (It seems that it the thread would be a Chatzitzah
Surely he always wears a smaller Mitznefes even when he does not wear Tefilin, e.g. Shabbos and Yom Tov. (PF)