What it is: A flat, oval-shaped brush that applies product in the crevices of the under-eye. Brush Formulation: Loose Powder Brush Coverage: Buildable Brush Handle Length: 7.275 Inches Bristle Type: Synthetic Ingredient Callouts: It is vegan and cruelty-free. What Else You Need to Know: The unique, synthetic hairs pick up and distribute product precisely and evenly. It can be used with Laura Mercier’s Secret Brightening Powder (sold separately) to instantly brighten the under-eye and set and extend concealer wear.