From the Glossy Stain Lip collection. What it is: Primary color base coats that allow you to customize your lip color when combined with other Glossy Stain Classic shades. What it does: An innovative addition to the Glossy Stain family, YSL’s new Amplifiers give you the ultimate bold lip. Layer the amplifier underneath your favorite Glossy stain to create your customized lip color. The texture is lightweight and immediately melts onto lips for long-lasting shine. How to use: Apply one layer of the