This method of extensions involves sewing a track of hair onto a horizontal base created at the scalp. This base can be either a braid, or a mricrolinks/beads base. Using a resilient stitching thread, the weft/track of hair is sewn onto the base. This method allows for a large amount of hair to be installed and gives a fuller more voluminous effect. The tracks are done in the middle of your head and underneath your hairline so you can't see them. A full head of extensions is usually about 3-5 tracks. This method takes about 1-3hours to apply. The hair can be removed and reused when needed.