... Chinese hair,Indian hair,Brazilian hair,Malaysian hair and so on;Synthetic hair such as kanekalon,toyakalon,high temperature fiber ... this is not quality problem,it is very nature.11.how to care human hair extension1)use a mild 4shampoo,rinse ... straighten if after wash ,if it is wave ,pls put some hair gel for holding this wave.4)you can ... be the acidity.7)no not discover the hair on sunshine too long.