Tony and Guy Colour Reviver Chocolate Brown Shampoo

I would use the product again to add a boost to flat hair colour. It's well worth the price, you can use it often to intensify the colour without damaging your hair. Toni and Guy also do some excellent hair conditioners.. Not one for big labels all the time, these products are very good and you can rely on them to do the job, they are a sound investment as they last ages.