The colour that changes everything with ME+ technology. Pure, balanced colour results with natural depth and shine. ME+ reduces the risk of developing a new allergy to hair colour. For people not allergic to hair colourants. Although the risk of developing a new allergy is reduced, there remains a risk of allergic reaction that can be severe. Always ask your stylist to perform an allergy alert test 48 hours before each colouration. ME+ is present in specific shades of Pure Naturals, Rich Naturals, Vibrant Reds, Special Blondes, and Deep Browns of the Koleston Perfect brand. Less hair damage colour after colour and helps neutralise free radicals in hair during colour formation. Simple 1:1 mixing ratio, up to 100% grey coverage, depending on the colour, up to 3 or up to 5 levels of lift. Versus previous Koleston Perfect.