My daughters told me recently that modest clothing is unremarkable in itself, but remarkable in its potential effects. Ironically, the benefit of modest clothing is its transparency, so to speak. Modest clothing attracts attention neither to itself nor to the superficial qualities of the person wearing it. In fact, by not being a distraction or an end in itself, modest clothing allows the character of the person to become more evident.

Indecent fashions tend to reduce the human person to the superficiality of their exposed or accentuated body parts ... saying, in effect, "Look at me, I'm an object. Look at me as an object." On the other hand, prudish clothing... Read more at catholicculture.org