Cosmetic pieces are made to be equipped in cosmetic armor slots and don't offer stat changes.
They can be equipped in the cosmetic slot next to the armor slot in the inventory window, allowing for different styles without requiring currently equipped armor to be removed.
Any wearable armor can be used in the cosmetic slot, provided it's the appropriate type (head, chest, legs etc).
|Top Hat||Silk (x5)
|Nova Scarf||Astronite (x3)
Orange Scarf (x1)
|Crown||Gold bar (x3)|