DESCRIPTIONRapidly diminish the signs of time with our breakthrough MolecuShift Technology, which first shrinks and then enlarges Hyaluronic Acid molecules to volumize the skin from within.Visibly plump and firm skin in two steps: Step 1: Evening: Infill Serum delivers shrunken Hyaluronic Acid molecules to be more effectively absorbed into skin. Step 2: Morning: Full Expansion Serum expands Hyaluronic Acid molecules back to their original size leaving skin even more hydrated, plump, and firm.RESULTSShiseido was the first cosmetics company to produce safe, high-quality Bio-Hyaluronic Acid with two times more hydrating power, and has continued to spend the last 40 years innovating and leading in Hyaluronic Acid research.After one day of use, respondents who have tried medical beauty/cosmetics treatments said skin feels more volumized than ever and looks firm as if they had a medical treatment.*Skin elasticity is improved, while wrinkles on cheek, undereye area, nasolabial folds (smile lines) and crow’s HOW TO USEApply before moisturizer. When using with other serums, apply Bio-Performance Skin Filler Serums as the last serum before your moisturizer.In the evening, pump Infill Serum once onto fingertips and smooth evenly over face and neck.In the morning, pump Full Expansion Serum once onto fingertips and smooth evenly over face and neck.For Refills: Save the pumps and caps from your original bottles. Insert the pump into the refill, then close cap.