Giorgio Armani Luminous Silk Hydrating Glow Extending Primer. BNIB Luminous Silk Hydrating Glow Extending Primer is a water-based, gel primer that plumps and hydrates skin , delivering a fresh-dewy finish to amplify glow under or over makeup. Formulated with Hyaluronic Acid and LHA skincare actives, this primer nourishes the skin for supple, radiant canvas for under foundation. This water-gel base primer pairs perfectly with Luminous Silk Foundation for the ultimate skin-like base and long-lasting natural glow. Can also be worn alone for an “off duty” look or mixed in with skincare or makeup to boost glow.