Get the perfect customised glow with the guerlain terracotta sun serum tan booster complex a luxurious way to prolong your tan created to activate intensify and prolong your tan this tactile serum ensures a natural looking glow all year round its unique formula has a dual action prolonging your tan by stimulating melanin production and also moisturising skin to ensure your glow lasts for longer for use on the face apply 2 drops of serum to your preferred moisturiser and blend with your