About Sent Hair: 1.Sent Hair,the United States Trustworthy Brand. 2.Return & Refund Guarantee: The item must be returned in new and unused condition Product Description 1) Brazilian Hair Material: Brazilian Virgin Hair 2) Brazilian Hair Type: Deep Curly Wave Human Hair 3) Brazilian Hair Color: Natural Black 4) Brazilian Hair Length: 8-30 inch 5) Brazilian Hair Weight: 95-105g/Bundle 6) Brazilian Hair Quality: Without Any Chemical Processing, No Shedding, No Tangle, No Dye, No Acid, No Smell, No Follicles. RFQ: Q1. How to identify whether it is human hair? A:Sent hair only sale 100% real human hair without any mix.Burning,is definitely a easy way.Human Hair will be ash after burning will show White smoke while burning.Synthenic Hair will be a sticky ball after burning and will show Black Smoke(or No smoke)while burning. Also after they burnt, Human Hair smells just like burning your own hair while Synthenic Hair has a plastic smell. Q2. About Hair Length A: Please stretch the hair to be Straight then measure it(0.1-0.5" error is admissible). In the case of same length, Straight > Body Wavy > Curly > Loose Wave. Q3. About the Cleaning: A: Before washing the hair you should comb gently the hair with comb or hands. Pour warm water and pour the right amount of shampoo in a pot, and wet the hair with water, like washing your own hair gently as usual, finally rinse the hair with clean warm water. Use a towel to wipe the hair, then let the hair dry naturally. If you need to use urgently, you can use the hair dryer with low heat.