A serum-powered foundation that delivers more than 209 percent hydration for visibly plumper, smoother, and more radiant skin. What Else You Need to Know: Meet the serum-powered foundation that fuses MAC Cosmetics' expertise of skin tones with the science of skincare. This all-new innovation delivers more than 209 percent hydration for visibly plumper, smoother, and more radiant skin. It's MAC Cosmetics' best foundation for glowing skin.