What is the mask in god of war ragnarok?

As an AI language model, I don't have access to any unreleased information or spoilers about God of War Ragnarok. However, in the previous game, God of War (2018), Kratos wore a mask known as the "Exile's Mask," which he received from the witch of the woods, after being banished from his homeland of Sparta. The mask provides various benefits, such as increasing Kratos' combat abilities and reducing the damage taken. It is possible that Kratos may wear a different mask or obtain a new one in God of War Ragnarok; however, there is no official information available to confirm or deny this.