Blond Absolu Cicanuit Hair Serum by Kérastase, the best hair treatment for bleached hair, is an intense night hair serum perfect for all blondes. This overnight hair treatment nourishes and strengthens dry blonde hair while you sleep. This serum for split ends restores the hair fibre overnight. Packed with Hyaluronic Acid and Edelweiss Flower extracts, provides the right scalp hydration, aiding in hair damage repair and sensitized hair recovery. Wake up in the morning to discover your bleached hair recovered, stronger, and healthier. Frizz is controlled, split ends are healed, and breakage is reduced, making your hair soft and manageable. This overnight hair treatment results in hair that is +95% stronger* and +74% more hydrated HOW TO USE: STEP 1 Before going to sleep, massage 2-4 pumps into lengths and ends of dry hair. STEP 2 Leave in overnight: wear a bun or braid for reduced morning frizz. STEP 3 No need to rinse in the morning.