Why have less, when you can have more? Meet the Olaplex No.4 Bond Maintenance Shampoo but in a whopping 1-litre size bottle. For hair that's seen better days, there's the Olaplex No.4 Bond Maintenance Shampoo. If you're a fan of the rest of Olaplex's line - you know, the treatment, the oil, all of that - this one has your name on it. Designed for locks in distress, this Olaplex shampoo is formulated with Olaplex's bond-building ingredient. With an incredibly concentrated formula, it works together with the Olaplex No.5 Bond Maintenance Conditioner, and Olaplex 3 to help restore internal strength and moisture levels. Your hair is left feeling softer, with a shinier, healthier looking finish. Designed to improve the manageability of all hair types.