ColorSmart was specifically designed for men with up to 50% gray. It discretely blends gray in minutes without changing the natural color. This no-ammonia formula contains special moisturizers. After the color treatment, hair is left healthy, younger looking and with body. Natural color is restored, gray is muted. Color tones stay natural looking and blend naturally with re-growth with no line of demarcations. Patented association of colorants with red inhibiting properties help ensure that coor will not shed over time and develop unwanted reddish hues. Color will stay natural looking even after repeated shampoos and will fade naturally on tone. To keep color look fresh, ColorSmart should be reapplied every 3 to 4 weeks or every time clients hair is cut.