Guerlain L'Essentiel Natural Glow Foundation 16H Wear SPF 20 Naturalness & make-up performance come together for the first time at Guerlain. A foundation made with 97% naturally-derived ingredients* with a natural glow finish that lasts for 16 hours**. The complexion is perfect, luminous and fresh. The comfortable texture becomes one with the skin, making it ideal for buildable coverage (light to medium).With L'Essentiel, bare skin is more beautiful, day after day.The formula lets the skin breathe; hydrates, balances and protects the skin from pollution. The complexion is more even; the appearance of imperfections is reduced.