This ring offers continual magical protection in the form of a deflection bonus of +1 to +5 to AC.
A deflection bonus affects armor class and is granted by a spell or magic effect that makes attacks veer off harmlessly. Deflection bonuses stack with all other bonuses to AC except other deflection bonuses. A deflection bonus applies against touch attacks.
"Cloak of Protection" não existe como um item mágico, então apenas quem inventou pode dizer.