1) It is very important that the hair has to be in its natural state, so there should not have been treated any chemicals or dyed.
2) The hair needs to have a shiny and healthy look. Avoid buying any flat, damaged or dry extension.
3i) In order to differentiate the virgin hair from non-virgin hair, look for a natural taper at the end of the extension, which you wouldn’t find on a common hair extension. The reason for this is that it is normally collected from multiple sources and processed to correct cuticle issues and to match sleek, curl or wave appearance.