The human hair weave is a needle-like fibrous tissue, are found in human skin, hair is a dead matter, is discharged from the body , protein intake protein from plants, through the stomach enzymes break down offer. Human hair weave after perm or After the injury, he did not repair capacity, buried inside the hair root in the scalp and hair bulb is a living, growing hair 1-2CM monthly pH value from 4.5 to 5.5 this hair, a total of three types: