Material: Human HairLength: 14/16/18/20/22/24inchNet Weight: 0.5g/strand| 100strand/pack=50g/packFeature: ? U tip hair extension is a perfect choice for people who is looking for long-term extensions,can match your hair very natural,Healthy with natural hair shine, no shedding and tangle free.? U shaped thin keratin glue , more invisible and comfortable, provide a more natural looking. Can be customized by cutting it to smaller bonds for need. A specific solvent allows to remove the keratin extensions easily.? It can be straightened, curled, washed and dyed to darker color with professional dyeing process. Only light color can be dyed to darker color. In the process of styling, please note that the temperature should not exceed 180 degrees Celsius.