What it is: A lightweight sunscreen serum with collagen peptides that help protect against sun damage and visibly correct early signs of aging.What it does: The lightweight sunscreen serum is specially formulated to protect against sun damage. Powered with advanced UV filters to help shield against UVA and UVB, and collagen peptides to help correct visible signs of UV damage, this SPF serum with an invisible finish works to boost skin radiance and visibly improve skin tone and texture while blending seamlessly across multiple skin tones. How to use: Apply the serum generously as the last step in your skin-care routine. Wait 15 minutes before UV exposure. Reapply every 2 hours.