The respected scholar, Muhammad Asad6, commenting on Qur'an 24:31 says " The noun khimar (of which khumur is plural) denotes the head-covering customarily used by Arabian women before and after the advent of Islam. According to most of the classical commentators, it was worn in pre-Islamic times more or less as an ornament and was let down loosely over the wearer's back; and since, in accordance with the fashion prevalent at the time, the upper part of a woman's tunic had a wide opening in the front, her breasts were left bare. Hence, the injunction to cover the bosom by means of a khimar (a term so familiar to the contemporaries of the Prophet) does not necessarily relate to the use of a khimar as such but is, rather, meant to make it clear that a woman's breasts are not included in the concept of "what may decently be apparent" of her body and should not, therefore, be displayed.
The Qur'anic view of the ideal society is that the social and moral values have to be upheld by both Muslim men and women and there is justice for all, i.e. between man and man and between man and woman. The Qur'anic legislation regarding women is to protect them from inequities and vicious practices (such as female infanticide, unlimited polygamy or concubinage, etc.) which prevailed in the pre-Islamic Arabia. However the main purpose is to establish to equality of man and woman in the sight of God who created them both in like manner, from like substance, and gave to both the equal right to develop their own potentialities. To become a free, rational person is then the goal set for all human beings. Thus the Qur'an liberated the women from the indignity of being sex-objects into persons. In turn the Qur'an asks the women that they should behave with dignity and decorum befitting a secure, Self-respecting and self-aware human being rather than an insecure female who felt that her survival depends on her ability to attract or cajole those men who were interested not in her personality but only in her sexuality --