21" 100 Human Hair Clip In Extension Now any woman can easily and affordably change her length and or add volume to her own hair with HairDo Human Hair Clip in Hair from Jessica Simpson and Ken Paves. HairDo Human Hair Clip in Extension Systems are available in nine color levels and six pre dyed "salon inspired" Vibralite colors. These extensions have been specially processed so that they can be professionally colored and or permed and cut to match any client s needs. Use the 21" 100 Human Hair Clip in Extension and short hair transforms to luxurious below the shoulder length hair.