https://www.youtube.com/watch?v=s5Mo7SEW-CA&t=5s
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 .