Trezi Colour Shampoo, Conditioner and Intensive Treatment Trio 1 Litre includes the Trezi Colour Shampoo & Conditioner specially formulated with gentle nutrients to nourish your hair and protect its colour from fading as well as the Trezi Intensive Treatment for those dealing with lifeless, brittle hair. Infused with a blend of all-natural plant proteins and oils, this treatment deeply penetrates each strand to provide much-needed hydration and strength.