FB Hair extensions are made from 100% finest human REMY 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 and 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 hair and split ends. It is normal and not a quality problem.