Orange goblin mail is made by using orange dye on goblin mail. Like all goblin mail, it is too small for players to normally wear as armour.
However, during the Land of the Goblins quest the player can turn into a goblin using a Transmogrification potion to access the tribal areas of the Goblin Cave. While wearing orange goblin mail the player can enter the Narogoshuun goblin tribe's area and pickpocket the Narogoshuun priest to obtain the Narogoshuun key required to continue the quest.
Orange goblin mail cannot be traded, but can still have value. It can occupy space in the inventory or bank. However, the dye and the goblin mailare tradeable.
You are also required to make orange goblin mail during the Goblin Diplomacy quest.