Nylon/spandexSilky seamless fabric stretches four ways for ease and freedom.Knit-in light support provides subtle under-bust shaping.Wide straps and fuller back offer gentle all-around smoothing.Wider bottom band helps prevent dig-in and roll-up.No seams. No wires. No hassles. Nothing but blissful comfort!Six easy sizes shape to fit you. (If you're near the upper end of your size range choose the next size up.)Comfy back close has up to 4 rows of adjustable hooks and eyes.Same as JMS Bras retail style 1271.