2x the gray coverage for 2x as long*Advanced Gray Solution semi- permanent color is ammonia and peroxide free. It gently colors and provides 2x the gray coverage for 2x as long.* Gray coverage that lasts up to 12 shampoos. *compared to Beautiful Collection Moisturizing Color. | Advanced O2 TechnologyAdvanced O2 Technology uses the oxygen in the air to develop the color instead of heat or hydrogen peroxide. No developer is used with Advanced Gray Solution shades. Rejuvenating your hair in a way that keeps it healthy. | Shiny, moisturized colorProvides intense gray coverage and works as a refresher for permanent hair color by adding luster to dull-looking hair. The result is shiny, moisturized color with gray coverage that lasts up to 12 shampoos. |