The World Federation One Stop Fiqh

Ruling 776

While performing prayers, a woman must cover her entire body, even her head and hair; and based on obligatory precaution she must cover her body in a way that even she cannot see it. Therefore, if she wears a chador in a way that she can see her body, it is problematic [i.e. based on obligatory precaution, a woman must not wear a chador in such a way]. However, it is not necessary for a woman to cover her face, nor her hands below the wrists, nor her feet below the ankles. In order to be certain that she has covered the obligatory areas, she must also cover a little of the sides of her face and a little of the area below her wrists and ankles.