The best waterproof liquid eyeliners are the ones made from quality ingredients. Liquid eyeliners that are considered the best are also those that last for hours at a time without smudging. Good Housekeeping recommends Stila Stay All Day Waterproof Liquid Eyeliner, which does not smear even when wet.
An applicator shaped like a pen often makes it easier for people to apply eyeliner. Liners that define the eyes and contain ingredients that do not irritate the eyes are ideal as well. For instance, some eyeliners contain vitamin E and aloe, which are conditioning and nourishing. Individuals who wear eyeliner may often also want to opt for products that properly line the tops and bottoms of the eyes for a more dramatic makeup look.