Olaplex's best-selling shampoo, is now formulated to celebrate the beauty of blonde! Olaplex No.4P Blonde Enhancer Toning Shampoo strengthens, softens, and neutralizes unwanted yellow tones for brighter, more manageable hair. 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, even if you’re proudly grey - this toning shampoo will help keep your color bright. 3X brighter compared to top purple shampoos Repairs, hydrates & brightens For all blonde, lightened & grey hair Gentle enough to use every shampoo All Olaplex products contain its patented technology, strengthening fragile bonds with every step of the routine for the healthiest hair possible. FIRM PRICE ON ALL OLAPLEX Brand new, sealed, unopened. Authentic, I am a licensed cosmetologist. (Please see my "meet the posher" for license) Scan the unique QR code on the bottle for proof of authenticity