1. ) Comb through the hair weft with a comb or brush just as you would your own hair.Combing through the hair weft first prevents problems with snarls as you work with the hair.
2.) Prepare the hair weft.Sew or cut a piece of hair to match the width of your weft clip. Start at the top of the hair weft and continue to cut down the length of the hair.
Your packages of weft clips can contain many different width sizes to work with. You can create a customized look by combining several weft clips together to make a wider hair extension. For example, use 4 weft clips for an 8-inch (20 cm) piece of hair, 3 weft clips for a 5- or 6-inch (13 or 15 cm) section, and 2 for a 2-1/2-inch (6.5 cm) section
3.) Lay the weft clip on a flat surface.The front of the clip should face you. You'll know you have it right if the clip is convex to the surface and you can see a bar across the comb.
4.) Locate the 2 sewing holes on each side of the comb.
5.) Cut a strip of thread about 12 inches long.Beading thread is best, but you can also double up regular cotton thread.
6.)Sew each side of the hair weft onto the weft clip.Knot the thread securely to the weft clip when you are finished.