Breakthrough technology which reduces grey a little bit with each shampoo for subtle gradual results. Use daily until you like what you see, then regularly to maintain the look you like. It never gets rid of 100% of your grey, so the look is always natural. It's a shampoo and conditioner that gently and thoroughly cleans and conditions in one step to leave hair soft and manageable. Best for all shades from light brown to black hair. Results may vary on naturally blonde and red hair. Not suitable for hair that has been lightened, bleached, highlighted or coloured.