FACIAL FUEL 4.2OZ. Benefits: Invigorates skin and helps it feel refueled, re-energized and revitalized. Absorbs quickly and leaves no residue. Formulated for men's skin. Key Ingredients: Chestnut Extract: derived from the sweet chestnut tree native to Europe and Asia; contains antioxidants that help to effectively neutralize free radicals. Vitamin Cg: a vitamin C derivative that activates once absorbed into the upper layers of the skin's surface; with antioxidant benefits, it's frequently used in anti-wrinkle skincare products to help reduce facial lines over time. Caffeine: an alkaloid known for its stimulating properties; in Kiehl's formulas, it helps energize and reduce dullness. :