Assassin Imperial armor is a standard armor art for assassins, available in the Factions campaign. This is a normal version and for those that wish to show off their "styles" get the elite version of this armor. It's known as the Assassin Elite Imperial armor.
The headgear for this armor and the elite version are identical. So, they don't have to get the elite version of the headgear to show off. Just this headgear would do.
NOTE: The actual Armor galleries and more information for them can be found on GuildWiki. This is a Fan Fiction Page.