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.
Castithan Machinist Headgear
Machinist Supply Crate from the Defiance Store
Castithan Outlaw Headgear
Outlaw Supply Crate from the Defiance Store
Castithan Survivalist Headgear
Survivalist Supply Crate from the Defiance Store
Castithan Veteran Headgear
Veteran Supply Crate from the Defiance Store
CDC Eradicator Headgear
Transferred if owned in Defiance Classic
City Survivalist Headgear
Supplies (Earth Republic Camp)
Transferred if owned in Defiance Classic
Collective Predator Headgear
Transferred if owned in Defiance Classic
Colonel's Hat Headgear
Von Bach Gunslinger Cache from VBI faction vendor after completing the Gunslinger DLC missions.
Transferred if owned in Defiance Classic
Corporate Operative Headgear
Transferred if owned in Defiance Classic
Dark Matter Enforcer Headgear
Transferred if owned in Defiance Classic
Dedicant of the Guiding Light Headgear
Transferred if owned in Defiance Classic
Defiant Few Recon Gear Headgear
Defiant Few Vendor (Coit Tower)
Twitch Drop August 10, 2018
Transferred if owned in Defiance Classic
Stratotech Defiance 2050 [Source]
3PL9 WDFG DKPR 9LE7 P7Y7 [Redeem]