Part of a capsule collection with adidas, these trackpants from Stella McCartney bring boudoir chic to a classic athletic style. Crafted front black cotton with an elasticized waistband and ribbed cuffs, the design is adorned with the signature 3-stripe sides and logo appliqués at the leg. Delicate lace insets create a sheer, sensuous look that's unexpected and achingly cool. Wear yours with one of the sweatshirts from the same collection and your favorite pair of sneakers for an enviable off-duty ensemble.