The Zombie Defense Organization t-shirt.ï¾  The ZDO has issued a new zombieï¾ t-shirt in prepartion for the coming apocalypse.ï¾  While once thought zombies were just a myth and part of horror films the ZDO has shed new light on the subject.ï¾  Support the cause of getting out the information the public needs with this official ZDO t-shirt.ï¾  We must stop the killing or lose the war!ï¾  This tee is printed on super soft cotton and feels great on.ï¾  ZDO has spared no expense on this great zombie shirt.