This shampoo is the fourth step in the REVOX B77 PLEX Hair Rebuilding System. It is a professional-level shampoo that deeply hydrates and repairs frizzy, damaged, or color-treated hair. It also maintains an optimal hydro balance, gently removes dirt and oil build-up from hair and scalp, and promotes stronger, healthier hair. Additionally, it helps reduce flyaways and detangled ends, leaving hair shinier, smoother, and more manageable with every use.