This toning shampoo is expertly formulated to neutralise unwanted yellow tones and brassiness, whilst strengthening and softening blonde, lightened, and grey hair. Infused with Olaplex's patented bond-strengthening technology, this highly concentrated formula works to repair fragile bonds, leaving hair significantly brighter with enhanced lustre and a soft, supple feel. For optimal results, apply to wet hair, lather thoroughly, and leave on for a customisable duration to achieve your desired level of toning and brightness before rinsing completely