This leave-in mask formulated with Peptide binder + 5 Amino acids. It repairs the macro-molecular structure of the hair**- the hair becomes stronger by +97%***- it gains flexibility and movement***. Provides heat protection to hair up to 230 degrees. **Instrumental test on the macromolecular structure of the hair fiber after the use of shampoo + rinse-off serum + leave-in mask ***Instrumental test- after the use of leave-in mask. ****Consumer test after using shampoo + rinse-off serum + leave-in mask