Rock out with the latest collaboration cap between action sports clothing company Metal Mulisha and one of the most intense energy drinks around town Rockstar, the official energy drink of Strikeforce MMA. One of the latest styles from the ongoing collaboration between the two brands which has produced an assortment of clothing and accessories, the Global Rockstar Flex-Fit Hat takes the meaning of extreme to new heights uniting the Metal Mulisha and Rockstar logos on the front, plus side panels and undervisor covered with an all-over print including both brands.