Advanced Strengthening System. Makes hair up to 5x stronger. Thoroughly cleanses dry or damaged hair while hydrating it with essential moisture. Re/newel Advanced Strengthening System with it five state-of-the-art conditioning technologies washes in strength and deep dimensional shine, creating a new definition for healthy, beautiful hair. Re/newel Advanced Strengthening System improves hair's health and protects hair from damage caused by combing, drying and styling, making it up to 5x stronger.