this multi-benefit purple hair serum both neutralizes brassiness and helps protect hair from heat and protects hair from blowdry heat. infused with japanese high-tech cool pigments and white peony extract, the serum uses a unique technology that delivers a gliding effect onto wet hair to provide instant radiance and shine, neutralization, smoothing, and blow dry heat protectant. benefits neutralizes brassy & yellow tones helps protect hair from blowdry heat replenishes hair blonde hair is instantly more radiant blonde hair is instantly shinier