Fight off the evil Decepticons and Dinobots this Halloween by transforming into the most famous Autobot of them all: Optimus Prime. Everybody knows who Optimus Prime is, and everybody will love your costume when you wear this officially licensed Boys Muscle Transformers 3 Optimus Prime Costume! This costume includes a jumpsuit with extra padding in the chest and shoulders to make you look big and imposing. The suit is also printed with the purple and red hot rod flames and the intricate mechanical innards from Prime’s Peterbilt 379 truck form. It also includes a plastic blue and silver mask that makes you look like you stepped right out of the Transformers movie. Optimus Prime is the dependable leader of the Autobots and a protector of Earth, and you too can be a hero when you wear this costume.