This high-performance serum from Guerlain is designed to reveal visibly rested skin, mimicking the effects of a full night's sleep, even after a few hours of rest. It works overnight to target visible signs of fatigue, helping to smooth the appearance of fine lines and restore skin's natural radiance. Utilize this serum as the final step in your evening skincare ritual for optimal rejuvenation while you sleep. It prepares the skin perfectly for the day ahead, ensuring a fresh and revitalized complexion upon waking.