Lamya Kaddor confronts the myths regarding the wearing of the Hijab. She shows that this is not an observance required by Islam. Rather it is an invention of misogynistic mullahs. Full text at link.
However, if God had required a special head covering, would He not have said so explicitly? The khimâr thus merely constitutes a 'fashion accessory' according to the spirit of that age. Viewed rationally, functions consciously or unconsciously associated with head coverings across the course of history – such as protection against sand or evil influences – are all superannuated today and have lost their validity. People's powers of imagination have changed.
Today's orthodox comprehension of the obligation to wear a head covering is primarily based on the interpretations of scholars who lived several generations after the Prophet Mohammed. One can follow their judgements but they are not sacrosanct. As human beings all scholars are fallible. Conservative and fundamentalist circles constantly emphasise that our behaviour should follow the Koran and the Prophet. Their spokesmen maintain that this directly accords with what was laid down during the Prophet's lifetime and the initial period of Islam.
However in reality this view is mainly based on the ideas of scholars who lived some 600 (!) years later – such people as Ibn Qudâma (d. 1223), Ibn Taymîya (d. 1328), or the latter's pupil Ibn Qayyim al-Jawzîya (d. 1350). Bearing in mind the patriarchal social structures of that time, it is unsurprising that interpretations of sources concerning relations between the sexes were usually unfavourable for women – even though that contradicts a striving (to be found throughout the Koran) towards improving women's situation.