Waterproof, smudge-proof eyeliner delivers long-lasting definition with a twist of the wrist: Color winds up when you need it, winds down when you don't. Gentle, soft, silicone-enriched formula delivers smooth, even lining. A built-in sharpener at the opposite end detaches for quick refreshes. Line and define the upper and lower eyelids based on eye shape and desired makeup result. To use: Apply using short feathery strokes, staying close to the lashline for a modern effect.