<p><strong>What it is: </strong>A two-serum fill and expand duo—one for night and one for day—that refines your skin's appearance on a molecular level.</p><p><strong>What it does: </strong>The duo consists of an Infill Serum for night and a Full Expansion Serum for day. The Infill Serum targets a firm, resilient look, with technology that sends compact hyaluronic acid molecules into deep layers. The Full Expansion Serum targets a lifted look, with technology that reshapes molecules to their original size in the skin—creating an extra moisture-retaining layer that helps push skin up.</p><p><strong>How to use:</strong> Use the Infill Serum around bedtime for overnight hyaluronic acid delivery into skin. Use after cleanser and before moisturizer. Pump once into hand and smooth over face. Use the Full Expansion Serum the next morning after cleanser and before moisturizer. Pump once into hands and smooth over face.</p>