Steve Rogers is a scrawny guy who is transformed into a World War II super-soldier in "Captain America: The First Avenger," the latest comic book adaptation to invade theaters.
In a rather similar way, Chris Evans, the hunky actor who plays the title role, underwent super-scrutiny to fill the shoes of the Marvel superhero in the 3-D film, which hit screens Friday.
A big issue was the Captain America suit, which had to retain its retro patriotic zeal and yet look plausible to modern audiences.
"It was a little overwhelming," recalls Evans, 30. "The first couple of fittings you'd have, you'd go in there and you'd put on the suit. And then they would file in about 20 people to take notes. You have three or four people dedicated just to the gloves and three or four people just to the boots."
And then there was the matter of the iconic shield, which required many prototypes and screen tests.
"It's amazing how different shields changed the whole look of the outfit, so that was another process," says the actor, who wields the bullet-stopping weapon in dazzling action scenes.
Aside from the wardrobe, there was the challenge of capturing Captain America's personal qualities. Evans says he and Steve Rogers have at least one aspect in common.
"I think I have a pretty unsilenceable conscience," says Evans, who sounds guarded as he deals with the media blitz for his biggest cinematic role yet.