16.
The matter of women's dress might seem trivial to some, especially in today’s Western societies; however, Islam assigns to it moral, social and legal dimensions. Islam has defined the roles of men and women by allocating certain duties to each and granting certain rights to each. This is in order to maintain a proper balance in society. When men and women observe the proper Islamic dress, they not only protect their own honor and reputation, but they contribute greatly towards peace and order in society.

In general, there are certain guidelines concerning Muslim women’s dress. Their garments should not be tight or translucent as to reveal the shape of what is covered. They must cover their entire bodies except the hands and face. This mode of dress is called "Jilbaab" which refers to a woman's outer garment, with which she is entirely covered. Muslim women do not dress modestly in obedience to their fathers, brothers or husbands, but only in obedience to God’s commandments.
Both men and women are expected to be chaste and modest and avoid any type of dress and conduct that may invite temptation. Both are instructed to look only at what is lawful for them to see and to guard their chastity. Allah directs men first and then women in the Quran:

“Say to the believing men that they should lower their gaze and guard their modesty: that will make for greater purity for them: And Allah is well acquainted with all that they do. And say to the believing women that they should lower their gaze and guard their modesty; that they should not display their beauty and ornaments except what (must ordinarily) appear thereof; that they should draw their veils over their bosoms and not display their beauty

except to their husbands, their fathers, their husband's fathers, their sons, their husbands' sons, their brothers or their brothers' sons, or their sisters' sons, or their women, or the slaves whom their right hands possess, or male servants free of physical needs, or small children who have no sense of the shame of sex; and that they should not strike their feet in order to draw attention to their hidden ornaments. And O ye Believers! turn ye all together towards Allah, that ye may attain Bliss.” (Quran 24:30-31)

The additional requirement for women to conceal their adornment and natural beauty is due to their greater need for privacy and protection. Except in the company of close relatives, a woman is required to cover her entire body with loose fitting garments with the exception of her face and hands.
The Quran states why Allah has prescribed particular dress regulations for women “O Prophet! Tell thy wives and daughters, and the believing women, that they should cast their outer garments over their persons (when abroad): that is most convenient, that they should be known (as such) and not molested. And Allah is Oft-Forgiving, Most Merciful.” (Quran 33:59)

https://www.youtube.com/watch?v=trdnkqE5MI4
https://www.youtube.com/watch?v=6YYiEwy0Z68