The Superman logo (aka Superman shiel) is the iconic emblem for the fictional superhero Superman. It is also informally referred to as the "S" shield. As a representation of the first superhero, it served as a template for character design decades after Superman's first appearance. The tradition of wearing a representative symbol on the chest was mimicked by many subsequent superheroes, including Batman, Spider-Man, Fantastic Four, Green Lantern, the Flash and many others.