When it comes to lip looks with major staying power, they have one thing in common: they stay within the lines. That, as you may be able to guess, is thanks in large part to lip liner. These pencil-like products help keep your lipstick from feathering or smudging and can help enhance and define your natural lip shape (or even make your pout look plumper). If you’re on the hunt for a long-lasting lip liner—or several—to add to your collection, scroll on. We’re paying a little lip service to our favorite formulas ahead.