The item gear in this game seems a little silly.
A circlet goes around ones forehead, you know in a circle thus circlet.
A hood goes OVER ones head.
It seems pretty logical that one could wear a circlet and hood. But alas they cannot in Skyrim. Oh and well I have five fingers, even in Pathfinder and DnD I can still wear two rings.
That's just a personal grip, all done and over with now