Protein Booster Skin SerumAdvanced anti-aging serum offers a daily-dose of anti-aging defense. The silky liquid texture is readily absorbed allowing for immediate delivery of the efficacious ingredients below the skin's surface. Serums are intended to be used with a moisturizer or blended with another product. It is the ideal companion to any of our moisturizers (Line Smoother or Double-Duty) or Post Shave Cooling Gel. Except for customers with oily skin, serums are not intended to provide adequate hydration when used alone | Jack Black - Protein Booster Skin Serum Size 60ml