"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. Smudge proof. Lines up in a rich array of colours and finishes. Brushes sold separately."
I recently ordered the MAC Fluidline in Blacktrack on my search for the perfect eye liner. I tried it this morning and wore it all day today while at work, and I have to say that I am very impressed so far. I have a problem with eyeliners smudging and melting all over my face. My eyelids are so oily, they eat measly little liners for brunch!
~Also, Bonnie has posted another superhero look, so go check it out! This time, it's Catwoman. :)