NUMBERS GAME

In 2015, Olaplex changed the hair-colour game, with the in-salon treatment becoming shorthand for essential blonde preservation. Now the brand has bumped up its offering to include a take-home shampoo and conditioner that continue to maintain hair’s strength and manageability. Olaplex No.4 Bond Maintenance Shampoo and No.5 Bond Maintenance Conditioner, $55 each.