The best-selling shampoo from Olaplex® is now formulated to celebrate the beauty of blonde. Olaplex® No.4-P Blonde Enhancer Toning Shampoo strengthens, softens, and neutralizes unwanted yellow tones for brighter, more manageable hair. Olaplex® No.4-P maintains all the benefits of the original No.4 and deposits just the right amount of tone to neutralize any unwanted warmth between salon visits. The sulfate-free, highly concentrated formula allows for customizable toning - The longer you treat, the brighter the results. Whether your blonde comes naturally or from your stylist, root to tip or balayage, and even if you’re proudly grey, Olaplex® No.4-P Blonde Enhancer Toning Shampoo will help to keep your color bright. Key benefits: ul.kit li {list-style-type: disc; margin-left: 15px;} Highly concentrated formula neutralizes unwanted yellow tones while strengthening and softening hair Infused with Olaplex\'s patented Bond Building technology to repair broken bonds and restore damage Customizable toning - The longer your treat, the brighter the results Suitable for all blonde, lightened or and grey hair, natural or coloured Results in just 1-5 minutes Paraben, Phosphate & Sulfate Free. Vegan, Cruelty Free formula