The Olaplex No.4P Shampoo, No.5P Conditioner, and the 12.55 fl.oz Treatment are part of Olaplex's professional product line, often used in salons or by haircare professionals. Here's a breakdown of each: Olaplex No.4P Bond Maintenance Shampoo: This shampoo gently cleanses the hair while maintaining and protecting the bonds in the hair. It helps to restore strength and moisture to the hair, leaving it feeling soft, smooth, and healthy. The "P" likely stands for professional or salon-grade. Olaplex No.5P Bond Maintenance Conditioner: The conditioner moisturizes and protects the hair, reducing frizz and flyaways. It nourishes and strengthens the hair, making it more manageable and resistant to damage. Similar to the shampoo, the "P" denotes that it's a professional or salon-grade product. Olaplex Treatment (12.55 fl.oz): This treatment is likely Olaplex No.1 or No.2, which are professional salon treatments used during coloring or lightening processes. Olaplex treatments help to repair and strengthen the hair's bonds, minimizing damage and improving hair health. These products are typically used in conjunction with Olaplex's bond-building technology to repair and maintain the integrity of the hair, especially during chemical processes. They're often recommended for those with damaged or chemically treated hair to restore its health and vitality.