What it is: A synthetic-bristle eyelining brush with a fine, flat, square-shaped head with a razor-thin edge.What it does: Ideal for use with powder or gel eyeliners or eyeshadow formulas, this brush can be used on the upper and lower eyelid and close to the lashline for precise eyelining and exact control. How to use: Use to apply eyeliner with confident precision. You can even use it for precision lipstick application. Synthetic hair Cruelty-free