Mermaid Hair Color - Mermaid is a cool ocean-blue neon shade with slightly green undertones. This high-pigment semi permanent hair dye delivers vibrant, long-lasting color that lasts 4-6 weeks, making it perfect for DIY transformations and salon applications. | Customizable and Mixable Formula - Create unique, personalized shades by mixing with other MANIC PANIC colors or our Pastel-izer to create soft trendy pastel hues. High Voltage is the perfect semi permanent hair color for women and men who want to dye hair without using developer. | Best Results on Pre-Lightened Hair - This temporary hair color works best to color hair that is a pre-lightened level 9 or 10 blonde. Use our Flash Lightning Bleach Kit to lighten hair before dyeing for best results. It can also be used as a hair dye for dark hair to achieve deeper shades. | Conditioning and Resealable Formula - This semi-permanent hair color is formulated with nourishing ingredients to deeply condition hair, leaving it soft, hydrated, and smooth. The resealable tub allows for multiple uses. | The Manic Manifesto - Manic Panic's hair coloring products are always Cruelty Free and Vegan - tested on celebrities, not animals! This vegan hair color is also ammonia and PPD-free, paraben-free, gluten-free, phthalate-free, and PETA accredited.