What it is: L'Oreal Feria Professional Permanent Haircolor's twenty-five minute automatic color processing makes it easy to use and the no drip, no-run gel formula makes application a snap. Crystal Pure Tone Technology ensures unsurpassed tonal variation and translucency. What it does: ? Shimmering highlights and lowlights in one single application ? Crystal Pure Tone Technology ensures unsurpassed tonal variation and translucency. ? Superb shine and conditioning ? 25-minute automatic color processing ? Use only with Feria Multi-Tone Color Developers ? 16 shimmering, fashion shades ? Feria professional was not created specifically for gray coverage, and certain shades are not recommended on predominantly gray hair What else you need to know: L'Oreal Excellence Liquid Permanent Haircolor gives 100% gray coverage with excellent, uniform results.