Genius Weft is incredibly thin, flat, and light, making it our most invisible weft. It's only 0.8-1mm tall. This flexible weft can be cut for unlimited customization. No return hair for no scalp irritation, matting, or shedding. Genius extensions can be cut and there will be no shedding after the cut. Genius wefts lay as flat as hand-tied weft. Seabeauty Genius weft is created for Salon Professionals. Please also note, Genius weft has a very delicate structure that deserves very careful hair care if you want it last longer