Looking for the ultimate color protection? Redken's Color Extend Magnetics line-up 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 treated hair will never have felt (and looked!) so good.