Yves Saint Laurent presents a revolution in foundation: Youth Liberator Serum Foundation offers medium-to-full coverage, skin-firming benefits, as well as 24-hour hydration and SPF 20 coverage.The anti-aging foundation is infused with Yves Saint Laurent's award-winning Forever Youth Liberator Serum. Youth Liberator Serum Foundation combines all-day, nonstop hydrating properties to smooth and nourish the skin with the patented Color Tune-Up Complex to correct dullness, giving you a newer, brighter complexion.From fair to dark complexions, Youth Liberator Serum Foundation corrects, unifies and evens all skin tones for an instantly younger appearance. Brand: YVES SAINT LAURENT. Style Name:Yves Saint Laurent Youth Liberator Serum Foundation Broad Spectrum Spf 20. Style Number: 954761. Available in stores.