Redken's Color Extend Magnetics Shampoo delivers the ultimate colour protection while enhancing softness and shine. As part of the SMART Haircare family, this sulfate-free, non-stripping shampoo was formulated with our exclusive RCT Protein Complex that has a smart, targeted deliver system to treat hair from the inside out, delivering three levels of customized nourishment. Enriched with Amino-ions to seal in colour, this richly lathering shampoo will gently cleanse while improving colour vibrancy and radiance for up to four weeks.