It works hard and always looks good—a sleeveless layer is a multitasker that can simultaneously polish your look, skim your midriff and elongate your silhouette. Ms. E, a strong choice is soft jersey with a drapey, angled front—elements that will draw interest to the center while pointing to long legs. Our suggestion: pair a sleeveless layer with heathered tees, ribbed camis and ruched, ruffled or metallic detail to highlight upper curves. Experiment with your other ally, proportion, as well—skinny jeans are great, but also consider a miniskirt, shorts or the kind of heels that can fell a runway model.