Revlon PROYOU Colour Shampoo This colour guard shampoo with natural extracts of Ginkgo Biloba and UVA/UVB filters of broad spectrum. How Does it Work? It protects the hair from sun radiation and prevents the loss of colour. Its regenerative active formula keeps the colour intensity whilst maintaining the structure of the hair. Professional Result: Thanks to Pro You Color the hair recovers the colour tenacity and intensity.Maintaining the colour result longer leaving it incredibly shiny smooth and manageable.