Looking for the ultimate color protection? Redken's Color Extend Magnetics lineup uses Redken's exclusive RCT Protein Complex technology which treats hair from the root, to the core, to the tip (RCT = Root, Core, Tip). Color Extend Magnetics is a sulfate-free formula allowing for a gentle cleanse and condition with up to 4 weeks of enhanced color vibrancy and radiance. Equipped with Redken's Multi-Targeted delivery system, soy proteins, arginine, and sepicap, your color treat hair will never have felt (and looked!) so good.