Sheldon's Greatest American Hero from big bang theory

Greatest American Hero worn by Sheldon

This Greatest American Hero shirt worn by Sheldon and a Chinese nerd from the big bang theory .
As worn by Sheldon in Season 2, Episode 4 (The Griffin Equivalency) and Season 3, Episode 5 (The Creepy Candy Coating Corollary)
Also worn by one of the Chinese nerds in Season 1, Episode 9 (The Cooper-Hofstadter Polarization)