Sheldon Cooper Green Lantern T-shirt from The Big Bang Theory

If you watch The Big Bang Theory, you must be familiar with the Green Lantern t-shirt that Sheldon Cooper is wearing on multiple occasions. I guess this t-shirt is made for geeks and fans of Green Lantern. Green Lantern is the name of some superheroes appearing in American comic books. They goal is to fight evil with their rings that give them various extraordinary powers like the power of flight.