Wella Koleston Perfect is a professional, permanent hair colour creme. Delivers vibrant, rich colour with less damage colour after colour**, while ME+ TM reduces the risk of developing a new allergy to hair colour*. Warning: This product is for professional use only. This product may contain directions should be made before use. Refer to packaging warning labels and instructions before use. ***These colours MUST be mixed with a Developer which is sold separately. Simple 1:1 mixing ratio. Up to 100% grey coverage. Up to 5 levels of lift. Pure, balanced colour results with natural depth and shine.