The Elf Halo Glow is not a foundation but a cream highlighter that is used to create a glowy effect on the skin. It has a pearlescent shimmer that creates a soft, ethereal glow when applied to the high points of the face, such as the cheekbones, browbone, and cupid's bow. It is designed to be lightweight and comfortable, so it can be worn all day without feeling heavy or greasy.