L'Oréal Paris Collagen Moisture Filler Moisture Bounce Serum is a lightweight facial serum formulated with 8% pure collagen, glycerin, and squalane to provide deep hydration and support a smoother, bouncier-looking complexion. The pearlescent formula helps give skin an immediate radiant glow while minimizing the appearance of dry fine lines. It provides hydration for up to 72 hours and is suitable for all skin types, including sensitive skin. The fast-absorbing serum can be used morning and evening after cleansing, before moisturizer.