This is a versatile pen brush highlighter from the Prep+Prime collection by MAC, it can be used as a regular concealer if you dont have serious dark areas under the eyes, or it can be used as intended to highlight after the concealer and also other areas of the face such as forehead, chin and cheek, just wherever needed to highlight any area.
This product is almost the same as YSL Touche Eclat Radiant Touch that also comes in the same shape.
This product comes in 4 shades and the one i have is called Light Boost which is a light yellow shade. I have noticed this product is always out of stock at our stores, and i have ordered mine online from mac website.
This is one of the best products i have used, i have serious dark undereye areas and i always prefer to use peachy toned concealers to correct those dark shades but i also like to highlight the same area, i dont like to add another concealer on top since products tend to settle on fine lines, this product does a great job in highlighting and it is not as heavy as a concealer, it brightens and awakens the eyes.