Outfits and Headgear are cosmetic only items. You can select 1 out of 4 outfits at the character creation screen. You can obtain outfits by completing some Pursuits, some Missions or purchase them from the game store.
Outfits are the entire appearance from the neck down and Headgear is the head only.
Ferik's Mask Headgear
Quest reward from Shanje Liro: Ruling Caste Arena
Mission: Sieze the Day, Control the Future
Transferred if owned in Defiance Classic