Virgin Hole Flat Weft is the newest type of hair weft. It combines the benefits of injection tape in extensions and flat silk weft extensions. It is made by injecting hair into the PU weft, which provides a light and undetectable appearance, giving the illusion that the hair is growing naturally from the scalp. PU weft can be made to fit flatter against the scalp. They will provide a more seamless and invisible hair look.