All our hair is 100% unprocessed Brazilian human hair. Hair Weft Information: Hair Material: 8A Grade 100% Brazilian Virgin Human Hair. Brazilian Straight Virgin Hair Extensions Human Hair Extensions Colour: 1B30, can be dyed and permed. Double weft, exquisite superior texture, tight and neat. -- Tangle free, no shedding, healthy and thick Q1:100% human hair A: Test by burning - Human hair shows white smoke when it burns and then becomes ash; Synthetic hair shows black smoke and becomes a sticky ball after burning. Q2: Hair Length A: Stretch the wig to make it firm, then measure. Q3:Hair Smell A: Our hair is 100% chemical free, but may have a local shampoo smell, anywhere, it will quickly lift the shampoo and conditioner after washing.