Cationic Hydration Interlink. Thermal protective treatment. Paraben free. Thermal Protective Treatment - CHI Infra Treatment is specifically developed to work in conjunction with the CHI line. CHI Infra Treatment with Cationic Hydration Interlink is a superior moisturizing and protecting treatment. Hair will be left with the proper balanced of moisture for silky manageable hair with incredible shine every time. Not tested on animals. Dispose of properly. Made in the USA.