Swim in style with plain one piece swimsuit designs from Athleta. Choose from a wide array of solid one piece swimsuits in dynamic colors and form-flattering cuts. Our plain one piece swimsuit collection includes the classic women's suit design with adjustable straps, mesh stomach liner and underwire support for superior comfort. You'll also find a wide variety of sophisticated halter swim dresses with adjustable tie halter neck, supportive underbust band and removable cups. Experience peak performance in the comfortable, stylish one piece swimsuits from Athleta.