Ultra-smooth, Fluidline's gel formula provides the precision of a liquid liner with a silkier, softer finish. Goes on foolproof with a brush in an easy dip-and-stroke action. Long-wearing, 16 hours. Smudge-proof. Lines up in a rich array of colors and finishes. Brush sold separately. Key Claims & Benefits: Long-wearing, 16 hours Waterproof Non-acnegenic Smudge resistant Ophthalmologist tested Dermatologist tested Usage: Line the lash line with Fluidline using a liner brush.