Schwarzkopf Professional's 1st highly pigmented anti-yellow wash, free of SLS/SLES sulfates, that quickly neutralizes stubborn yellow undertones on lightened hair at the shampoo bowl for cool blonde results and great hair in an instant. Our unique formulation at a pH level of 4.5 supports the Violet color pigments to quickly adhere to the hair for maximum neutralization. Say hello to clear, bright blonde.