GENTLE ON SCALP: Schwarzkopf Simply Color's caring formula is dermatologist tested to be non-irritating to the skin. It is free from both PPD & PTD.NATURAL COLOR RESULTS: Enjoy beautiful, vibrant hair color results that are even from root to tip.VISIBLY HEALTHY HAIR: This gentle hair color is formulated with botanical oat milk, soy protein, and argan oil. It is free from ammonia, alcohol, and silicone.UP 100% GRAY COVERAGE: Our color crème offers long-lasting color & up 100% gray coverage.If your hair is longer than shoulder length, we recommend using 2 boxes of Simply Color hair dye for the application.Looking to extend your color? Try Schwarzkopf’s Color Boost, an in-shower customizable color vibrancy booster. Just mix 1-5 drops into your favorite conditioner to increase color intensity between colorings.