Question: what are the different grades of human hair?
Answer: Grades Of Human Hair Extensions Grade AA 100% human remy hair 50% drawn – e.g. in a bundle of 18″, around 50% of the hairs will measure 18″. Grade AAA 100% human remy hair 60% drawn – e.g. in a bundle of 18″, around 60% of the hairs will measure 18″.