2x fortified hair breakthrough formula features protein extracts that penetrate deep into every strand leaving hair 2x fortified vs uncolored hair zero ammonia zero odor say goodbye to that typical salon haircolor smell the revolutionary zero ammonia formula means no odor no discomfort just amazing color 100 coverage your stylist can cover gray flawlessly while leaving hair shiny conditioned and fortified multi dimensional 4d color results hair is infused with long lasting col