Provides shiny, moisturized color with intense gray coverage Works as a refresher for permanent hair color by adding luster to dull-looking hair Semi-permanent hair color that knocks out the grays 2x the coverage and lasts 2x as long Lasts up to 12 shampoos Best for curly textured hair Intermixable for custom colors Leaves hair full of shine and feeling moisturized Gentle enough to use immediately after relaxing, relax and color same day Advanced O2 Technology uses oxygen in the air to develop the color vs using peroxide No developer is needed Lasts up to 12 shampoos Free of ammonia and peroxides