Short Synthetic Hair Weave Wig

How to tell human hair with synthetic hair?
human hair has natural protein. It is easy to tell by burning and smell. Human hair will be ash, which will go away after pinching. Human hair will smell foul. When burning, the human hair will show white smoke.
While synthetic hair will be a sticky ball after burning and will show black smoke. Moreover, human hair may have very few gray hairs and split ends. It is normal and not a quality problem.