Armor Permutations is a feature in Halo 3, Halo 3: ODST, Halo: Reach, Halo 4 and Halo 5: Guardians that enable players to customize their multiplayer character's armor appearances to their liking. In Halo 3, this feature allows the players to change the helmet, shoulder, and chest pieces worn by their multiplayer character. In Halo 3: ODST, players can choose between the preset armor of their squad members of the team, and can toggle whether or not their character wears an ODST helmet, though this will not affect health nor will it increase the effectiveness of enemy head shots. In Halo: Reach, players can purchase different armor from The Armory, which also includes wrist armor, knee guards, utilities, visor colors, shoulder armor and armor effects. Players who purchase Helmets in Halo: R