What is the ruling on wearing the jilbab, and what is the opinion of the the Four Imams on this matter?

The jilbab can be a loose garment worn by a woman over her clothes or a khimar. The ruling on wearing it depends on how well it achieves concealment (satr). Islamic law (Sharia) has not specified a particular type of clothing for women but has laid down conditions for concealment. If these conditions are met, the clothing is permissible; if not, it is not permissible. Scholars have unanimously agreed on the obligation for a woman to cover her entire body, with the exception of the face and hands.