Southernskies wrote:
Can 5E Armor Runes be inscribed onto clothing, or must it be 'armor'?
That's a good question, and the wording in FiM says that 'one mundane item' has 3 rune slots, but each rune only has functions listed for armor and sometimes shields. That means that the magic of the rune only takes hold when inscribed on an armor or a shield. When inscribed onto clothing, the rune looks lovely but does nothing.
As runesmiths improve their craft and artisans improve their skills and gain access to new materials, it is possible that an effect for clothing could be discovered for certain runes. Then once those runes are inscribed on clothing they would have an effect. But for now, such effects do not exist.