Skin weft,which is also called as PU weft, PU skin weft,PU hand-tied weft,is made of premium 100% human hair hand-knitted to very thin and transparent PU (Poly-urethan coating). It can add your hair length and makes it perfect. It is 100% hand-tied,and PU refers to a kind of material, gauze-like, nearly transparent, onto which hair strands are tied, making your hair looks natural and totally undetectable,as if growing from yout own scalp. Skin weft is a new technology, which is easy and fast to beautify and perfect your hair,cutting down the need to go to the beauty shop. The user just need to peel off the tape and stick in hair line or anywhere that you like.Please kindly note that the tapes need to be changed every 3 months. And extra tapes are supplied.