Machine Weft â Wavy is widely known for its myriad properties including natural bounce, low tangling, and less shedding. It is available to us in various sizes and types. It is made from natural human hair, that is shiny and lustrous. Therefore, the offered weft looks impressive. Typically, hair weft is used in order to increase the length and density of your hair. You can wash, iron, and restyle this Machine Weft â Wavy as it is a natural hair extension.