What it is: A long-wearing waterproof eyeliner that offers the precision of liquid liner with the ease of a gel-based formula.What Else You Need to Know: Bobbi Brown’s bestselling waterproof gel eyeliner provides ultra-precise, budge-proof, smudge-proof, fade-proof definition. This highly pigmented gel-based eyeliner lets you create subtle to dramatic looks effortlessly, all with 8-hour wear.