Biolage Colorlast Shampoo is expertly formulated to gently cleanse and preserve the vibrancy of colour-treated hair, ensuring lasting colour depth, tone, and brilliant shine. This low-pH formula, infused with a carefully calibrated colour care concentrate of soybean oil, delivers optimal protection, nourishment, and preservation for enduring colour, high lustre, and supreme smoothness. For best results, apply to wet hair, lather, and rinse thoroughly, integrating it seamlessly into your regular hair care regimen to maintain your hair's radiant hue