Lancôme science discovers the inner light of perfect skin and recreates it. Pioneer Discovery. Light is not only reflected on the surface it is also naturally re-emitted from deep within the skin. This is skin's inner light. At its peak, this surface radiance (1) and inner light (3) constitute skin's aura. When visible light reaches skin, it begins a real journey: 5% of light is reflected: this is skin's surface radiance (1) 95% penetrates skin and interacts with the epidermis and dermis. 55% is absorbed (2) and 40% is re-emitted at the surface (3) this is skin's inner light. Aura-Inside (TM) Technology. A Lancôme exclusive which associates: A new generation of bioptic pigments combined with classic mineral pigments. Together, they reproduce the appearance of inner light of perfect skin, by recreating the intensity and pristine freshness of its radiance. A unique liquid light essence maximizes skin's surface radiance. Benefits: Enhances skin's natural light. The complexion appears flawless, full of life as if lit-from-within. Bare skin sensation, correction with translucency for a natural finish, as if matter-free. 18 hour hydration. Diminishes redness for a more uniform complexion. Non-irritating/doesn't cause break-outs. Protects skin from UV damage. Technology Aura-Inside™ technology. 10 times less powdery fillers. Liquid Light Essence "liquid micro mirrors" 37% pure water and soothing rose extract calms the skin. Oil-free, fragrance-free formula. SPF 15.