Saudi Arabia
Among unrelated men, women must cover the parts of the body that are awrah (private). In much of Islam, a women's face is not considered awrah. In Saudi Arabia and some other Arab states, all of the body is considered awrah except the hands and eyes. Accordingly, most women are expected to wear the hijab (head covering), a full black cloak called an abaya, and a face-veil called niqab.  Many historians and Islamic scholars argue that the Quran was interpreted to require the veil as part of adapting it to tribal  traditions.