"The Smith Cosmetics 205 Angled Liner Brush (£26.50) is synthetic, although it's important to note that the brand does use real hair in some of their brushes. This one is good because it's stiff enough to precisely apply gel liner but not so stiff that it pokes you in the eye. I also like to use it to apply brow powder or pomade to cover up any sparse patches," Panych said.