In my headcanon this is how abra gets its armor, Under the armor abra wear a black jumpsuit, the material is unknown but it's assumed that they probably steal the material for it. The gloves, boots, and other parts are made from wrapping latex sap covered leaves around there body parts until the latex sap drys. natural latex normally dries yellow hence the yellow appearance of the armor, after it dries, the abra dips the unfinished piece for another few coats. The brown parts of the armor are made from carving some wood into pieces with a sharp rock or ay sharp object they can find.