The one beauty product I can’t live without: Eyeliner. As other ladies with monolids (or those who who don’t have a defined eye crease) like myself might agree, putting on eyeliner correctly has taken many years of trial and error. Now that I’ve finally mastered the technique, I want to make sure the liner lasts. That’s why I’ve rounded up the nine best liners that literally stood the test of time. Whether you’re at the office, a holiday party or even through sweat sessions at SoulCycle, check out above to see the ones that make it through the day.