TRESemme Pro Collection Keratin Repair Conditioner with smart Bond Plex™ technology visibly repairs hair from styling and heat damage. This smart system works to smooth and shield hair fibres from within for strong, healthy-looking hair that is protected from future damage. Styling, heat, combing and washing can lead to hair damage and break essential hair bonds, resulting in dull and unmanageable hair. Our smart technology penetrates the hair to construct new bonds and strengthen hair from within.