Powered by Olaplex’s signature Bond Building Technology™, the No.7 and No.3 Duo offers hydrating, smoothing and radiance-enhancing benefits to lacklustre and breakage-prone hair. Set Contents: No.3 Hair Perfector 100ml A pre-shampoo treatment infused with Olaplex Bond Building Technology™ to hydrate and prep hair before shampooing. With a pH balance of 3.5-5, the treatment helps to enhance the smoothness and shine of dry hair. No.7 Bonding Oil 30ml Acting as the final step in your haircare routine, the hair oil delivers nourishment and hydration to the hair. The multi-tasking formula can be used to smooth the appearance of flyaways, enhance vibrancy and deliver heat protection up to 232°C.