Leo Rosten, the author of The Joys of Yiddish,defines mensch this way:
Someone to admire and emulate, someone of noble character. The key to being “a real mensch” is nothing less than character, rectitude, dignity, a sense of what is right, responsible, decorous. In short a guy your mother would like you to be with. Pure cotton colour blue, navy, black. Sizes M, L, XL, XXL