What it is: A two-piece day and night regimen for skin featuring products that combine the power of vitamin C and retinol.Kit includes:- C.E.O. Vitamin C Rapid Flash Brightening Serum (0.27 oz.): a highly potent, fast-absorbing serum infused with 15% THD ascorbate (vitamin C) to fight the look of dullness, dark spots and discolorations.- Luna Retinol Sleeping Night Oil (0.17 oz.): an oil that works throughout the night to deliver visibly youthful, luminous, even-toned skin in the morning. How to use: Apply 1-2 pumps of C.E.O. onto clean skin morning and night. Apply Luna as needed to clean skin at night. Luna will go from blue to clear when massaged deeply enough into the skin. It does contain retinoids, so it is not safe for use during pregnancy. Paraben-free; sulfate-free; phthalate-free Made in the USA Sunday Riley is a Certified B Corporation, which meets standards for verified social and environmental performance, public transparency and legal accountability to create a more inclusive and sustainable economy