Schwarzkopf Bonacure Ph 4.5 Color Freeze Silver Shampoo 250ml is for cool colour tones, perfect for neutralising hair that shows unwanted yellow tones or for hair that is silver and needs subtle silver tone direction. Provides an overall strength to the hair structure that brings it to the optimal pH 4.5. So coloured hair will be closer than ever to 0 fade. This light-weight conditioner instantly detangles and improves comb-ability of coloured hair.