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. How to Use: 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. In case of contact with eyes, rinse immediately and thoroughly. Kiehl's daily SPF may be used alone or under foundation. Retinol Skin Renewing Daily Micro Dose Serum: After cleansing, apply Kiehl's serum with retinol over the entire face, including the under eye and crow’s feet area, carefully avoiding contact with the eye, eyelid area, and lips. If applied during the day, our serum with retinol should always be used with SPF. New never opened in original packaging Note: This item has an expiration date of May/2025 🚨Save More! Bundle 2 or more items and get 20% off automatically! Send me an offer after bundling, and if accepted, I’ll throw in FREE shipping! Let’s make a deal!