Matrix Color Insider Permanent Color 6RV+ 2 Ounce 67 Milliliters Unlike traditional permanent hair colors which are water-based, ColorInsider is Matrix's first oil-based hair coloring system. This oil-rich system optimizes the efficiency of the hair color process by facilitating the delivery of coloring agents into the hair fiber. ColorInsider delivers a high-definition color result, a perfectly polished finished look with no ammonia and no odor. How it works The ColorInsider ODS² Oil Delivery System helps to propel color molecules directly to the hair’s core and helps preserve the hair fiber's integrity for an even reflective-looking finish. ColorInsider respects the essential amino acids and lipid balance of natural hair. *This is a professional product and should be used only by a trained individual. Seller is not liable for any adverse outcome resulting from the use of this product.