What it is: A foundation with medium coverage and a semi-sheer finish that brings the dream of a perfect foundation to reality. What it does: With a fresh, light texture, it glides onto the contours of the face like a second skin to enhance beauty naturally all day long. Bio-Fusion micro-mesh, a unique combination of contouring and smoothing stretch fibers of natural silk and linen, is in total affinity with skin. It blends so perfectly and naturally onto skin that it can't even be felt. It mattifies skin while hydrating agents bring softness and comfort throughout the day. A blend of natural fibers of silk and linen weave a light veil of perfection and softness on the skin's surface. Smoothing flexible fibers adhere to skin and set makeup with lasting hold that stays put all day long. A Silk-Fusion complex combines a hydrating silk protein with a soothing textile extract that provides softness and comfortable contouring hour after hour. How to use: Apply a few drops to your face and then, using your fingertips or a foundation brush, blend, moving from the middle of the face outward and down to your neck for best coverage. For an all-day second-skin mattifying finish, apply a powder to complete the look. Style Name: Guerlain Lingerie De Peau Natural Perfection Foundation. Style Number: 5224206. Available in stores.