Olaplex Blond Enhancer Shampoo & Conditioner Duo with the No.4P Blonde Enhancer Toning Shampoo and No.5P Blonde Enhancer Toning Conditioner, this dynamic duo is your ticket to vibrant blonde hair. The shampoo and conditioner work together to neutralize brassiness and enhance the vibrancy of blonde, highlighted, and gray hair, leaving your locks looking fresh and revitalized. Hello radiant, beautiful blonde with the Olaplex Blonde Enhancer Duo!