A unique human or synthetic fiber hair extension and method are disclosed. One embodiment of the human or synthetic fiber hair extensions come packaged with double sided tape attached to both sides of the hair extension, with the weft and human or synthetic fiber hair attached between the two pieces of tape. The double sided tape is covered with a tape cover or liner on both sides of the extensions. First, the human or synthetic fiber hair extension is positioned for correct placement below the horizontal part line, the liner is removed form the bottom side of the hair extension and the human or synthetic fiber hair extension is secured by pressing into place. The second piece of double sided tape which is attached to the second side of the human or synthetic fiber hair extension and facing up has the liner removed and is then covered with a layer of the users's natural hair, which taken from the clipped area above the part. This creates a sandwich-like effect attachment of the human or synthetic fiber hair with the user's hair. Also shown is a flow chart and various application methods aiding the stylist in analyzing and applying extensions to the users head.