Old Navy Active Go-Dry Black Racerback Sports Bra Medium Support (Size 1X Plus) This plus-size Old Navy Active Go-Dry sports bra delivers dependable medium support in a classic black racerback design. Perfect for keeping you secure and comfortable during workouts, it features a built-in cup spacer that separates and shapes naturally without bulky padding. The body is cut from a sleek, supportive blend of 85% polyester and 15% spandex, while a smooth lining (92% polyester/8% spandex) sits comfortably against your skin. To keep you cool when your pace picks up, the back panel uses a breathable, high-stretch power mesh crafted from 75% nylon and 25% spandex.