The science of sexy skin starts with Benefit's toning and smoothing serum for face and "neck-colleté." Leaves skin radiant and silky to the touch. Rated "S" for sexy, Firmology is clinically proven to firm, tone, smooth, and revitalize your complexion for a more youthful glow. Firmology is lightweight and oil-free, with a luminous light-reflecting pigment. This serum is so sexy you'll be tempted to call it "complexion lingerie."