Clarins Hydra Essentiel Night is a treatment that works while you sleep. Its unique formula rich in Hyaluronic acid, plant extracts and plumping pearls deeply hydrates and fills in small wrinkles and expression lines, providing elasticity and firmness to facial skin. The Bio Squalene extract exerts a retentive action on moisture, thus maintaining hydration for longer. Upon awakening, the skin appears hydrated and radiant, progressively smoother and with a radically improved appearance. We recommend applying at night by gently massaging from the inside out of the face onto clean, dry skin.