People already comfortable with liquid eyeliner brush application, or willing to practice with one, who want a quick-drying, smudge- and water-resistant line. The fast-set formula is less forgiving for first-time liquid-liner users than a pencil would be, and anyone with sensitive or watery eyes, or who wears contact lenses, should patch-test first since it's a water-resistant formula not marketed as ophthalmologist- or contact-lens-tested.

Its differentiator is the combination of a brush-tip liquid format with a fast-set, water-resistant finish — it's meant to behave more like a tattoo-style liner that locks in place quickly, rather than a liner that stays workable for several minutes after application the way some gel or pencil liners do.

Shake before use if the formula has separated. Starting thin at the inner corner, draw close to the lash line and build thickness toward the outer corner for a wing if desired. Let it set for a few seconds before blinking. To remove, use an oil-based makeup remover rather than water alone, since the formula is water-resistant.

Pro: the brush tip allows a controllably thin line close to the lash line, or a thicker wing with a second pass. Pro: the quick-dry, water-resistant finish holds up well through humidity or light tearing. Con: that same quick-dry property leaves little time to fix a shaky line once it's down. Con: a water-resistant formula like this typically needs an oil-based remover rather than rinsing off with water or a mild cleanser alone.