The identity is used primarily as a disguise for the antagonists of each film to conceal their identities while conducting serial murders, and as such has been portrayed by several actors. In the Scream universe, the costume is not unique and is easily obtainable, allowing others to wear a similar outfit.
The mask seems to be a mix of 2 materials, and the way it's apparently sewn, it is not common. The skull is simply painted.
