What it is: A powerful, beautifying serum concentrate formulated to help refine and smooth the skin.Wit's for: Ideal for all skin types.What it does: The serum instantly tightens pores and prevents them from enlarging; corrects irregularities in the skin's texture; and hydrates with an astringent concentrate. Your skin gently absorbs the formula to create a very natural smoothing and mattifying effect. Day after day, it ensures a flawless skin texture and helps your complexion regain its balance. How to use: Morning and/or night, apply one pump of the serum to clean, dry skin. Use by itself or under your regular skin-care regimen. 1 oz.