Worst Extensions EVER [SEP] I am abhorred at the misrepresentation of these extensions. This should be illegal and I think it is. This WAS NOT 100% human hair, I believe it was yak hair. The “Keratin” on the utip is something alien that broke down and melted in my hair.  See pics. The ends melted together the first time I tried to curl it. These are something aimed at Halloween costumes. BUYER BEWARE…DO NOT BUY THIS HAIR!!!!