High Voltage Semi-Permanent Classic Colours give you rich, bold and vibrant shades that last 4-6 weeks sometimes more, and fades gradually with shampooing. These electrifying shades are conditioner based dyes with restorative properties which fill, add moisture, and soften the hair. It s safe to mix Manic Panic hair colours to create custom shades making the possibilities of creations endless!Manic Panic is a vegan based formula, meaning it contains no harsh chemicals (PPD, ammonia and paraben free) and will not harm the hair. Manic Panic hair colour is worn by the most glamorous of pop stars such as Katy Perry, Rihanna, Lady Gaga, Cyndi Lauper and Nicki Minaj. Tested on celebrities, not animals.PPD-free, Paraben-free, Gluten-free, Ammonia-free, Resorcinol-free and Phthalate-free.