Book 12 with new cosmetic upgrade system will allow players to create unique appearance. Once you've reached level 20, you'll have access to a few new tabs in your Character Journal which allow you to toggle between your base Equipment and both Outfits. Any item you drag on the corresponding Outfit Slot will be equipped cosmetically, overriding the appearance of the item in their base Equipment slot, as you can see in the following video
From: dexikovicek