ROUND LAB Birch Juice Moisturizing UV LOCK SPF 45

Round Lab Birch Juice Moisturizing UV LOCK is a chemical broad-spectrum sunscreen (SPF 45, PA++++, no UV filter details specified on packaging) formulated as a hydrating lotion with birch juice and hyaluronic acid. The product delivers a dewy, lightweight finish without white cast on most skin tones and is fragrance-free, making it suitable for sensitive skin. At approximately $8.28–$10.35 per fluid ounce (roughly $0.28–$0.35 per ml), it sits at the lower end of the K-beauty sunscreen price range. The 2-pack format at $27.99 (Prime exclusive) is a popular bundle offering. Community feedback emphasizes hydration and ease of application under makeup, though some users note it requires careful reapplication and may feel tacky in high humidity.