This product listing appears to reference a set containing a Clinique Smart Night Serum and a separate SPF 30 product, although the primary item referenced is the serum. As a restorative night treatment, the Smart Night Serum is designed to work while you sleep, helping to visibly repair skin overnight and improve firmness and radiance. It supports the skin's natural nighttime repair process, resulting in a smoother, more youthful appearance upon waking. The inclusion of SPF 30 suggests an associated product focused on daytime protection against environmental damage.