What it is: Pureology Perfect 4 Platinum Cool Blonde Enhancing Treatment features a ZeroSulfate strengthening formula that cleanses and softens while enhancing brightness, shine and colour retention on high-lift hair. What it does: Concentrated sulfate free and salt free formula gently cleanses hair without stripping colour or damaging the hair. What else you need to know: Provides gentle detangling and Lightly moisturizes