What It Is: Kiehl's Day-To-Night Derm Duo protects and smoothes skin around the clock. Advanced UVA/UVB technology helps defend against UV rays, pollution, and free radicals while Kiehl's potent retinol serum visibly reduces wrinkles, firms skin, evens skin tone, and smoothes texture with minimal discomfort. $111 Value! Set Includes: 1-oz. Retinol Skin Renewing Daily Micro Dose Serum 1.7-oz. Super Fluid Daily UV Defense SPF50+ What It Does: Retinol Skin Renewing Daily Micro Dose Serum this potent retinol serum is formulated to deliver a daily-strength dose of Pure Retinol for visible results with minimal discomfort including redness, dryness, and peeling. Super Fluid Daily UV Defense SPF50+ formulated with advanced UVA/UVB technology and pollution protection, Kiehl's lightweight facial sunscreen helps prevent fine lines, wrinkles, and dark spots. Key Ingredients: PURE RETINOL: Kiehl's formula with Pure Retinol helps steadily accelerate skin surface turnover to bring new, fresh skin to the surface to help address visible signs of aging for skin that's visibly renewed and youthful looking. VITAMIN E: Vitamin E is known to help neutralize skin-damaging free radicals. In addition to antioxidant protection, Vitamin E is often used in moisturizing skincare products. BAICALIN: Baicalin is a Scutellaria Root Extract commonly used in Traditional Chinese Medicine. Within Kiehl's formulas, it provides antioxidant benefits important in defending against free radicals. How to Use: Retinol Skin Renewing Daily Micro Dose Serum: After cleansing, apply Kiehl's serum over the entire face, including the under eye and crow's feet area, carefully avoiding contact with the eye, eye lid area, and lips. If applied during the day, our serum with retinol should always be used with SPF. Super Fluid Daily UV Defense: Apply a nickel sized amount of Kiehl's daily facial sunscreen with SPF 50+ in the morning at the end of your daily skincare routine, avoiding the eye area. Kiehl's daily SPF may be used alone or under foundation.