Kérastase Blond Absolu Serum Cicanuit Overnight Serum - 90mlFormulated with a high concentration of hyaluronic acid and infused with precious edelweiss, this powerful serum works while you sleep to strengthen and hydrate sensitized bleached hair fibre, visibly reducing the appearance of split ends and leaving you with stronger, softer and shinier blonde hair. Simply apply before going to sleep on dry or towel dried hair, and wake up to luxurious blonde locks endowed with an irresistible fragrance of blooming