The tube reads "reduces dull, brassy tones, brightens and smoothes blonde or highlighted hair". It's a violet coloured cream containing Fade Defy technology, a UV filter and it claims to help protect against heat damage. I run a few drops of this stuff through damp hair before blow-drying and it leaves it looking smooth and shiny, reduces flyaways and prevents that 'fluffiness' I used to get immediately after styling my hair. It feels very light on my fine hair and doesn't weigh it down like many other hair products. The smell is devine, like parma violets! (but it's a subtle scent and deffinately not overpowering). You don't need very much so a 250ml tube lasts for ages. Plus it's as cheap as chips :-D Holy Grail status.