The best primer formulas do for your skin what shapewear does to your figure – they set the foundation for a flawless finish.The Guerlain L'Essentiel Pore Minimizer Shine-Control Primer is packed with 97% naturally derived ingredients like avocado and white cocoa bean extract, not only mattifying and preparing the skin for make-up, but also visibly smoothing pores and keeping complexion looking matte all day long.