Whether it's summer or winter, we all want our skins to be glowing and smooth - that's what Sunday Riley's C. E. O. 15% Vitamin C Brightening Serum does. As the name suggests, the antioxidant formula is enriched with vitamin C to target discolouration without any stripping effects. It also focuses on hydration and a smoother texture, resulting in a brighter, radiant complexion - just don't forget to apply your spf afterwards.