CHI Infra Treatment CHI Infra Treatment with Cationic Hydration Interlink is a superior moisturizing and protecting treatment. Hair will be left with the proper balance of moisture for silky manageable hair with incredible shine every time. Product Features: Thermal Protective Treatment pH 4.5 Cationic Hydration Interlink is a superior moisturizing and protecting treatment Provides proper balance of moisture for silky manageable hair with incredible shine every time. Directions: After shampooing the hair, apply a generous amount of CHI Infra Treatment and work into the hair evenly. Leave on hair for 2-5 minutes and rinse thoroughly.