COSNORI Superproof Fitting Brush Eyeliner is a liquid pen eyeliner built to stay put—through sweat, oil, and whatever your day throws at it. The 0.1mm ultra-fine brush tip gives you full control for everything from subtle lash-line definition to sharp wings. Available in Black, Black Brown, and Brown to suit your mood and style. Who is This For?: Anyone who's tired of their eyeliner smudging, fading, or disappearing by lunch. It's especially helpful for oily lids, monolids, or hooded eyes, but works beautifully on all eye shapes. Key Benefits: - Waterproof, sweat-proof, and sebum-resistant so your liner stays where you put it - 0.1mm brush tip for precise, controlled lines—thin or bold, your call - Thin film-coating formula dries down smooth with vivid, consistent color - Three shades to choose from for natural everyday looks or bolder definitions Key Ingredients: - Ethylhexyl Acrylate/Methyl Methacrylate Copolymer — Creates a flexible, long-wearing film that keeps your liner locked in place - Carbon Black — Delivers rich, intense pigment for bold color payoff - Butylene Glycol — Keeps the formula smooth and easy to apply