WHAT IT IS Eyestudio Master Precise All Day Liquid Eyeliner Makeup.Long-wearing, water and smudge-proof eyeliner delivers precise definition in just one stroke. BENEFITS This waterproof eyeliner features an ultra-fine tip that delivers the most defined, precise line. Allure Best of Beauty Award Winner 2013. Ophthalmologist tested. Dermatologist tested. Fragrance free. Suitable for sensitive eyes and contact lens wearers.