I’ve found a few wins throughout the years—Victoria Beckham Beauty’s Satin Kajal Eyeliner and Sarah Creal’s Hypoallergenic Long-Wear Eyeliner. But a new formula hasn’t won me over in a minute; well, until Ilia’s Thru Line Waterproof Eyeliner landed on my desk. What’s Different About the Ilia Thru Line Waterproof Eyeliner Formula? How Do I Apply the Ilia Thru Line Waterproof Eyeliner Formula? Is the Ilia Thru Line Waterproof Eyeliner Worth It?