As brows become an increasingly important part of everyone's beauty routine, there's no shortage of gels and pencils to enhance lesser arches, amp up color, fill in holes, and extend overplucked ends. But the lucky ones already blessed with Cara Delevingne-like brows just need something to keep them in place. Thankfully, M.A.C.'s on top of it. The brand's Brow Shaper ($15) isn't new--but it has flown under the radar thus far. At Proenza Schouler's S/S 13 fashion show in New York last month, a slew of beauty editors were surprised to discover its existence as makeup artist Diane Kendal used the colorless, eyeliner-like pencil to secure the models' brows. "We're rubbing this on the brows," Kendal said. "Just brushing them up and using this to keep them put." The clear wax works with you to hold the brows up, down, or out-whichever you prefer, without any added color or shine (a sometimes side effect of clear brow gels). It's a foolproof way to enhance your natural assets-and isn't that the best kind of beauty product?