Islamic Dress Code

I don't look down on them ...I just asked an honest question because it doesn't make sense to me sometimes.

I cover up only because that's what Allah(SWT) and His Prophet(SAW) has ordered us, I don't need to know the scientific or medical reason for it.

If we rely on medical reasons then we should stop covering up because according to science most covered women are more likely to have less Vitamin D thus it's better not to cover up to get more Vitamin D from sun.