Manic Panic semi-permanent blue hair dye is formed from high quality ingredients and as a result is certain to give you high quality hair color! It is also completely vegan friendly and PPD free, so you can use it safe in the knowledge that nothing bad is going in to your hair. Another fantastic thing about this hair dye is that it's long-lasting. Each application lasts up to 6 weeks, so you don't need to worry about your bold blue hair color fading too quickly. Getting a vibrant hair color isn't difficult with Manic Panic!