MONSTER ENERGY Green Zebra Cap Genuine Athlete Issue First Edition. The most popular design with athletes. They were all requesting this style and only the top athletes got them. This cap was part of Monster Energy's first Athlete Only clothing collection. These products were never put on sale anywhere in the world and were only sent to official Monster Energy athletes. This is likely to be the last new quality version of this design in the world as it has been kept as part of a private collection since 2010. None have been made since. The 6-panel cap is printed all over ...