Harnessing the hydrating power of hyaluronic acid, Kérastases Chronologiste Pre-Cleanse Régénérant deeply cleanses and purifies your hair and scalp without stripping skin of its natural oils and moisture. Promising to leave your locks feeling and looking silky smooth, the revitalising formula is lightly scented with notes of light woods, tea rose and musk that linger long after youve rinsed it out.