Questions? Leave a comment below! The Butt-Lifting Leggings That Jennifer Garner and Reese Witherspoon Love. Spanx's butt-lifting leggings are a mainstay because of their contouring design. High-waisted and just a bit shy of your ankle in length, the Booty Boost 7/8 Leggings create such a flattering silhouette that they're almost the no-squats-needed hack for giving your butt a perky lift. They're made with breathable and sweat-wicking fabric that's essential for tough workouts. Details New with tags Size Large Sculpting performance fabric provides a built-in booty lift Sweat-wicking, breathable and quick-drying High-rise waistband stays put during workouts (and prevents muffin top!) 7/8 length hits between the calf and ankle Center-seam free for no camel toe Signature contoured waistband gives the illusion of a perkier rearview Hidden pocket in waistband fits a key or credit card