This blue ninja facemask is the trademark mask worn by Frost, who has similar freezing abilities as Sub-Zero. Frost's Mask first appeared along with her in Mortal Kombat: Deadly Alliance and later reappeared as a collectible Relic within the Konquest mode of Mortal Kombat: Armageddon.
In her cameo appearance in MKX's Story Mode, she wore a face mask that had a resemblance to the mask worn by her Grandmaster Sub-Zero's default costume in the same game.
In her return as a playable character in MK11, Frost wears her mask again, although they take on a much more futuristic and cybernetic appearance, due to Frost taking on the cyberization process which turned her into a Cyborg. Her mask is also a gear item and is also customizable with many mask designs available to choose from.
- Despite the Eternal Klash Skin Pack giving her skins and a mask that resembles her past self. The specific mask given isn't actually the same one she wore in Deadly Alliance/Deception/Armageddon.