What is it: A one-piece, multi-weft, clip-in extension that creates an easy, fashionable style without the hassle of working with several individual wefts.Who is it for: Women of all ages who want to add length and/or volume to their hair without a lot of fuss. While easy to use with any hair thickness, the 16" Fineline extension is the perfect clip-in extension for the woman with fine hair.Why is it different: Instead of the hair being sewn onto a fabric weft, it is stitched to a resilient, thin layer of polyurethane. The result is a lighter, thinner, virtually undetectable piece that lays flat to the head for a more comfortable, natural-looking effect. Also, because it is made with Tru2Life synthetic hair, this piece can be curled or straightened with thermal styling tools depending on the desired look. How do I use it: After clipping the hair on the top of the head out of the way using the two duckbill hair clips that are included, clip in the 16" Fineline extension as instructed in the illustrated style guide. The pressure-sensitive clips used in attaching the piece provide a comfortable, secure fit. From hairdo by HairUWear.