When the Zombie Apocalypse began, there were too many human casualties. More fighters for was needed to be formed. To exterminate the subhumans, a Combat Division was formed back in 2012. These heroes didn't risk infections spreading, especially airborne viruses, that's why the gas-mask is symbol of their mark. Among them, Unit 813 was the bravest of them all! This tee will totally be a vintage of memory. Let others know that you were part of this winning team with this unique shirt!