Prisión Fatal (English: "Deadly Prison") is both the name of a major show series promoted by the Mexican Lucha Libre, or professional wrestling promotion International Wrestling Revolution Group (IWRG) as well as the name of the match that always main events the show. The Prisión Fatal match is a steel cage match where the participants are chained to the cage, with the last person in the cage being forced to either unmask or have their hair shaved off according to Luchas de Apuestas traditions.