Benefit Cosmetics Brow Microfilling Pen.

Benefit Cosmetics Brow Microfilling Pen. New. Never used. Full size. Shade Deep Brown. Benefit's Brow Microfilling Eyebrow Pen creates the illusion of natural brow hair with 3 ultra-fine lines in a single stroke. It's designed to blend in with existing hairs, fill in gaps AND make brows appear where before there were none.