Balmain Double Hair Extensions Human Hair 40cm 3Pcs is a reusable weft extensions system made of the highest quality 100% Human Hair. Each weft contains three layers of hair which allow you to create instant volume and length with a minimum number of applications. To ensure invisible integration and comfortable wearing, the wefts are fastened under a layer of extension hair with either clips, rings or keratin bonds. One pack of Double Hair equals a basic volume treatment. Content: 3 pcs DoubleHair wefts (width: 9cm, length: 40cm), 2 clips attached to each weft.