The Matrix SoColor Sync Alkaline Toners are formulated to deliver full-bodied, tone-on-tone, semi-permanent colour for a brilliant result with no ammonia. Each conditioning formula is blended with Bond-Protecting Concentrate which helps to maintain the integrity of the hair structure, colour after colour*. The formulas are pre-blended with both background and reflect to help control warmth on every colour, every base, and every underlying pigment. The SoColor Sync Pre-Bonded tone-on-tone shades are perfectly colour-matched with SoColor Pre-Bonded permanent shades, so you can achieve seamless, root-to-tip colour that lasts and fades on tone. The Alkaline toner range includes over 50 shades from cool Ashes to warming Mochas and vibrant Reds, that last up to 20 shampoos.