Neutrogena Hydro Boost Hydrating Serum, 30ml, boosts hydration for smooth, supple skin all day. Made with hyaluronic acid, this face serum instantly absorbs to quench skin and delivers hydration for fully hydrated skin that glows day after day. Naturally found in the skin, hydrating hyaluronic acid acts as a sponge for dry skin cells, moisturizing with up to 1,000 times its weight in water, resulting in more supple and smooth skin. Get extra hydration when used with Neutrogena Hydro Boost Water Gel or Gel-Cream. Made oil-free and non-comedogenic so it won't clog pores or cause acne breakouts. Layers under makeup and can be used as primer. To use, apply evenly to face and neck after cleansing and before Neutrogena Hydro Boost Water Gel or Gel-Cream.