Estee Lauder Advanced Night Repair Synchronized Recovery Complex II Serum enhances your skin's beauty while you sleep. ChronoluxCB Technology is exclusive to that brand and maximizes your skin's ability to renew overnight. In just four weeks, lines and wrinkles reduce in appearance, and your face feels smooth and hydrated. Fight keys signs of aging with just a few drops of Estee Lauder's advanced night repair serum.