Redken Extreme Strengthening Shampoo & Conditioner 33.8 oz Liter Duo Set (with Free Tail Combs) Part of the SMART Hair care family, discover the fortifying shampoo for damaged hair or distressed hair that helps fortify your weakened strands and strengthen hair.Hair strengthening shampoo that cleanses, strengthens and fortifies weakened areas. Restores and repairs hair while protecting hair's natural shine.A smart, targeted delivery system, the exclusive new RCT Protein Complex treats hair from the root to the core to the tip, giving all 3 levels the custom nourishment they need. Benefit Cleanses, strengthens hair and restores shine Helps fortify weakened areaHow to use Apply daily, if desired, to damp hair. Massage into a lather. Rinse thoroughly. For best results, follow with Extreme Conditioner. Part of the SMART Haircare family, discover the fortifying detangler for damaged hair that helps to detangle, smooth, and strengthen your hair. One of Redken's best-selling products, this hair strengthening conditioner protects shine, repairs your hair and leaves it supple and shiny.A smart, targeted delivery system, the exclusive new RCT Protein Complex treats hair from the root to the core to the tip, giving all 3 levels the custom nourishment they need. Benefits Detangles, smoothes, and strengthens hairHelps fortify weakened hair areasLeaves hair supple and shinyHow t useAfter shampooing, apply and distribute through hair. Rinse.