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 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.