Weave
Extension hair on wefts sewn onto cornrowed hair with a needle and thread.
Also: sew-in
A weave, or sew-in, is made by braiding the wearer's hair into flat cornrows and then sewing wefts, strips of hair joined at the top, onto the braids with a curved needle and thread. The result can be straight, wavy or curly, of any length. A leave-out section of the wearer's own hair, or a closure, covers the stitched tracks at the top. Weaves last several weeks and keep the wearer's own hair braided underneath.