Bonacure PH 4.5 Color Freeze Vibrant Red Micellar Shampoo effectively cleanses natural or colour-treated red hair, improving vibrancy and hair condition. Lightly distributing red pigments through the hair, it maintains and intensifies red coloured bases whilst boosting radiance. Cell Perfector Technology seals the cuticle and by adjusting the hair to its optimal pH value of 4.5, colour pigments are frozen deep inside the hair fibre, reducing colour fade virtually to zero.