Redken Acidic Bonding Concentrate Shampoo (300ml) – a sulphate-free shampoo that provides ultimate strength repair, intense conditioning and colour fade protection for damaged, dyed hair. Featuring Citric Acid+ Bonding Care Complex, this unique formula reinforces weakened bonds within the hair to improve overall tensile strength and elasticity. This pH-balancing shampoo is specifically formulated for an acidic pH to combat the negative effects of colour processing, hot styling tools, and ionised water.