SoColor Sync is a brilliant, seamless tone-on-tone hair colour with no ammonia. Discover the bold, full-bodied look of SoColor Sync SPN. Professional tone-on-tone neutral tones used to tone light blondes. SoColor Sync Sheer Pastel shades now include Cool+ Technology, meaning colour fades cooler and stays true to tone for up to 20 washes. SoColor Sync leaves hair feeling toned and polished which is reflected from root to tip. Each formula is blended with bond-protecting concentrate, which helps to maintain the integrity of the hair colour after colour. Not only does SoColor Sync help care for the hair fibre by providing a conditioning effect, it leaves newly coloured hair feeling soft and smooth after the colour process. Click Here to see the Matrix SoColor Sync Pre-Bonded Technical Manual.