The only demi-color with Cera-Oil Priming Complex, now formulated with 2X more ceramides.What It Does? Tone-on-tone haircolor? No Ammonia? Now with up to 2X more conditioning that lasts up to 20 shampoos**vs. a formula without Cera-Oil Priming ComplexWhat Else You Need to Know? A total of 65 shades? Extended sheer pastel family shades to tone pre-lightened blondes? New reflect shades for a more reflective pure tone result? 3 tonal families that cover up to 75% grey? Mix 1:1 with 10 Volume Matrix Cream Developer.? Apply Color Sync to dry or towel dried hair. Take even sections to ensure complete saturation.? Process up to 20 minutes at room temperature.? Rinse thoroughly, cleanse and condition.