Biolage Colorlast Shampoo is expertly formulated to gently cleanse and preserve the vibrancy of colour-treated hair, helping to maintain its depth, tone, and overall lustre. This low-pH formula, infused with a carefully calibrated colour care concentrate of soybean oil, delivers optimal protection and nourishment for lasting colour, high shine, and supreme smoothness. For best results, massage into wet hair, lather thoroughly, and rinse well, integrating it seamlessly into your regular hair care routine