Requirements: 13 Charisma
“A key part of a good disguise is making your actions believable.”
You have a +5 bonus to Deception and Performance skill checks made for the sake of making others believe your disguise.
You can feasibly put together a believable disguise by wearing someone else’s clothes, uniform, armor, etc, and while doing so, you have advantage on Deception checks made to hide your identity, or to prevent your disguise from being seen through.