Manic Panic CLASSIC Formula - Sirens Song

Manic Panic CLASSIC Formula - Sirens Song Siren's Song is a neonblue-green hair dye that glows under blacklight. For best results, Manic Panic recommend applying to hair that has been pre-lightened to the lightest level 10 blonde. How many 4oz containers of Manic Panic hair color should I buy? Short Hair up to Bob Length: 1 jar/bottle for thin or thick hair. Below the Shoulder up to Waist Length: 2 jars/bottles for thin hair and 2-3 for thick hair. Tailbone or Longer: 3 or more jars for thin or thick hair. Details: Style: Classic Semi-Permanent Hair Dye Color: Siren's Song Color Description - Cool Neon Blue Green Hair Dye Volume: 4oz / 118ml Ingredients: Vegan Friendly, PPD Free! Additional Features: Benefits of Conditioning Hair, Resealable Tub For Longer Use, Comes With Instructions, Glows Under Black Light in the Dark Duration: 4 - 6 weeks