Protect your hair colour to the maximum with the likes of Kérastase, Redken and Matrix colour extender shampoos and treatments. This range of colour extender shampoos and treatments specialises in keeping coloured blonde hair bright, brown hair shiny and red hair fiery. By using colour extender shampoos and treatments, they will help create a long-lasting, healthy feel to your hair that will help your colour stay bright and bold between colourings.