Small wonder. Big benefits. This deluxe mini is the perfect travel size-or a perfect way to try it for the first time. Advanced Night Repair serum works night and day to help optimize skin's natural rhythm of repair and protection. At night, with our exclusive 1-in-60-million Night Peptide, it helps support skin's visible renewal and firming. Hyaluronic Acid helps lock in moisture. By day, this serum with 8-hour antioxidant protection helps defend skin against visible effects of free radical damage from environmental sources like pollution. This is the high-performance face serum beautiful skin can't live without.