What does full Hijab entail for a woman? Does it simply involve wearing modest loose clothing that covers the body, or is it specifically about wearing an Abaya?
Bismihi ta'āla
As far as outer hijab and Islamic dress-code for women, wearing a 'abayah or chador is not compulsory, unless it is the common custom of a particular society, and not wearing it will be seen as bad.
In brief, wearing of modest and loose clothes, is enough, as long as deflects any attention of men.
And Allah knows best