This brush is 5mm in diameter and is made of synthetic/vegan hair.
It is double-sided; on the one end is a brush, and on the other is a mascara wand head. Conveniently, this means you will not need two separate brushes for your eyebrows – this brush is eyebrow central!
Use it to create an exceptionally neat eyebrow, or to apply eyeliner.
PRO TIP: Synthetic brushes, like this one, hold their shapes much better over time than natural brushes!