Marvel Monday: Heroes At Last!

Despite the fact that the only hero in the Marvel universe thus far has been Bruce Banner, August of 1962 saw two new entries into the ranks. And one of them is a bona fide hero! The other isn't yet, but he will be by the end of his issue and the uttering of the words, "With Great Power Comes Great Responsibility."

Why did he ever lose the underarm-netting?