Pureology's Strength Cure shampoo is designed to strengthen fragile and damaged hair. Its rich repairing formula protects the hair fiber while adding softness and shine to your hair. Strengthens hair structure Protects against external aggressions Repairs visible damage Adds shine and softness Sulfate-free professional formula HOW TO USE Apply an appropriate amount to wet hair. Gently massage the scalp then rinse thoroughly. Repeat if necessary. For optimal results, use with Strength Cure conditioner.