IT Cosmetics Tightline 3-in-1 Black Primer Eyeliner Mascara is an all-in-one product designed to provide lash primer, eyeliner, and mascara benefits. Its ultra-skinny wand reaches the root of your lashes, applying black pigment between them for instant tightline eyeliner definition and the appearance of a fuller lash line. Enriched with biotin, proteins, hydrolyzed collagen, and a peptide-infused lash serum, this multitasking mascara delivers beautiful, eye-opening results.