Bobbi Brown Long-Wear Gel Eyeliner ($26) is an award-winning product that's become one of the bestselling eyeliners because it's long-wearing (it's waterproof plus sweat-and-humidty-proof for 12 hours). Yet it has the ease of a gel-based liner with the precision of a liquid liner.
It's highly pigmented for a dramatic look but it looks great day or night. Because the gel formula dries quickly, you do have to move fast when applying it - and make sure you close the tiny pot tight after use or it will dry out.
Even if you already have an eyeliner brush, we recommend also purchasing the superb Bobbi Brown Ultra Precise Eyeliner Brush ($28). Dip both sides of the brush in the gel eyeliner and wipe off any excess on a tissue. Working quickly, apply the liner in short, even strokes close to the lash line from the inner eye corner to the outer corner. To keep the brush clean between washings, wipe it off with a tissue when you're finished.
Another reason to love this eyeliner is that it comes in 12 gorgeous shades: Black Ink (a jet black), Black Mauve Shimmer (a deep chocolate mauve), Caviar Ink (a deep black-brown), Chocolate Shimmer (a dark red brown), Cobalt Ink (a dark blue), Denim Ink (a navy blue), Espresso Ink (a black brown), Granite Ink (a granite grey), Graphite Shimmer (a dark grey), Ivy Shimmer Ink (a dark emerald green), Sepia Ink (a rich brown) and Violet Ink (a violet purple).
Available at Bobbi Brown makeup counters at department stores including Nordstrom and Belk.