There are a few quests I've come across that have offered a piece of armor needed to do the questline. Most are removed form inventory when done, but some stay. For example in New Tunaria, you get a pretty white robe( you keep it), in Frostfang sea, there's a bear cap (you don't keep it) and in one of the world events, you get a robe to help you gain access to a cult. (you don't keep it). Can anyone think of any items such as this they've run across in their travels? Oh, I thought of another..Tiff in the CL gives an outfit but it's no zone, so now way to put on a mannequin
