What it is: A hair serum inspired by skin care that helps to replenish essential moisture to hair while eliminating brassiness. What it does: It uses violet and pearlized pigments to reveal visibly brighter blonde hues. As the essential first step when caring for blonde hair, this lightweight serum allows for seamless layering of styling products and ensures more even distribution of product throughout the hair. Your hair is left protected, touchably soft and lit-from-within. Free of hydrogen peroxide, it won't turn your hair brassy. How to use: Dispense 1-2 pumps of product into your hands and work through clean, towel-dried hair from just below your roots to the ends, focusing on any particularly dry or damaged areas. More product can be added for thicker textures or longer lengths. It can be used daily to brighten and tone blonde hair. 3.4 oz. Sulfate-free; gluten-free Dermatologist tested Safe for color- or keratin-treated hair Cruelty-free Vegan Made in the USA