Infused with patented Olaplex Bond Building technology, No.6 smooths, conditions and strengthens without adding hold or excess weight. This leave-in reparative styling treatment is excellent for all hair types, including curly, dry, coloured and chemically-treated hair. Speeds up blow dry time while smoothing and softly defining air-dried curls. Also reduces frizz and flyaways for up to 72 hours.