Asalam Alaikum

Muslim woman who follows Islamic dress code consider themselves free from being judged by her physical features, but rather to be judged by her character. What important is their intellectual and personality, and not the discrimination for their beauty. While women always emphasize on their beauty to fulfil the standard of attractiveness set by men, Muslim women set themselves free from being such a display object , but rather consider themselves as humans who have an exclusive right over themselves.

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First and foremost, we must wear hijab because Allah has commanded us to do so: "O Prophet! Tell your wives and daughters and the believing women that they should caste their outer garments over their persons (in abroad). That is most convenient, that they should be known and not molested. And Allah is Oft-Forgiving, Most Merciful." [Qur'an, 33:59].

" And say to the believing women that they should lower their gaze and guard their modesty; that they should not display their beauty and their ornaments except what appear thereof; that they should draw their veils over their bosoms and not display their beauty..." [Qur'an 24:31].

We must obey Allah because He created us to obey Him: "I have only created jinn and man that they obey Me." [Qur'an 56:51]. Therefore, being Muslim means to obey Allah whatever He commanded us to do. We know that whatever Allah has commanded us to do is for our own benefit and it does not profit nor harm Him.

Some of the benefits are:

a) We are protected from sexual attention. Have you noticed how women who beautify themselves and walk down the street get a lot of sexual attention? The West says that it is not the women's fault that she is sexually molested and rapped. And that it is her right to dress as she pleases. But it is her fault for enticing the offender and his fault for committing the crime. Both are at fault. When a Muslim woman is fully covered, she will not get the sexual attention. She may get attention at first out of curiosity but this is not the same as sexual attention, for sexual attention is the dangerous one.

b) Society is not corrupted by evils. It is common knowledge, even amongst Western psychologists who would admit it, that man is a sexual creature. When he sees a beautiful woman, he will get sexual urges. You can just imagine what happens to a society with so many women flaunting their beauty around! Where will these men (and women) go to fulfill their urges? Look around your society - rape, pedophilia, buggery, gayism/lesbianism, adultery, broken homes, mistresses etc - all sorts of indecency arises. A'uthubillah! We seek refuge with Allah from such vulgarity!!! At the other extreme, when women's beauty is seen as a common thing because it is everywhere, people will get bored with it and therefore want to try something different - hence, homosexuality, buggery etc. A'uthubillah! We seek refuge with Allah from such horror!!! So it does not matter whether a woman is in mini skirts or in loose clothing, as long as she is not totally covered, her beauty is still seen. Have you noticed how a change in hairstyle can beautify a person? Or how long, beautiful, not-so-clinging clothing actually accentuates the body? If you have seen those 'make overs' you will understand that it is the hair, make-up and clothing that beautify the person (superficially of course).

c) Promotes modesty. Women don't become slaves to their vanity. They don't compete with each other and 'bitch' over it. This is not to say that wives don't try to look good for their husbands. In fact, they should because this is the norm: the woman and man makes her/himself beautiful for her/his partner. What makes more sense? A woman who beautifies herself for the all and sundry to see but does not do so inside her home for her loved one, or a woman who beautifies herself for her husband and covers and protects herself from the eyes of the world?

We pray that this has helped. May Allah guide you.

https://www.answering-christianity.com/munir_munshey/hijab.htm
http://www.muhajabah.com/onveiling.htm
https://www.answering-christianity.com/bassam_zawadi/womens_veil.htm
http://muslimconverts.com/hijab_niqab/hijab-why.htm

What about vitamin c defficency and health effects
Also it is not sutaible for hot desert.

Also it is not sutaible for hot desert.
 

Similar stupid claim was made by hypocrites: They are a fitting example of people with no will power. Numerous indeed are those who dislike to go through any hardship and turn away when they are required to make a real effort, preferring cheap comfort to noble effort and humble safety to a position of honour that involves taking risks. They collapse in utter exhaustion behind the rows of believers who move on with seriousness, knowing that the advocacy of the true message requires great sacrifices. Nevertheless, those believers march forth and pay little attention to the size of the opposition or the tough impediments they face, because they know that it is part of human nature to try to overcome impediments.

Those who remained behind rejoiced in their staying [at home] after [the departure of] the Messenger of Allah and disliked to strive with their wealth and their lives in the cause of Allah and said, "Do not go forth in the heat." Say, "The fire of Hell is more intensive in heat" - if they would but understand. (9:81)

The sūrah answers them coupling the truth with sarcasm: "They said [to one another]: Do not go to war in this heat.' Say: ‘The fire of hell is far hotter.' Would that they understood." If they fear the heat of the summer and prefer the comfort of staying in the shade, how will they tolerate the heat of the Are of hell, when it is much more intense and longer lasting? Although this sounds like a remark full of derision, it only states the truth. The choice they had to make was between striving for a certain period in defence of God's cause, tolerating the heat of the earthly summer or being thrown in hell for an extended period the length of which is known to God alone.