Next, Crouch added a black waterproof gel eyeliner, because it's sweat-proof and adds more volume to your lashes. She only applied it on the top eyelid to keep the look more natural. "I just prefer gel to pencils," she enthused. "It's just easier to work. You have more flexibility with control using a brush [to apply it]." If you want to lift the look of the eye a bit, then flick your brush up at the very end to create a subtle cat eye.