Just My Size Pure Comfort Seamless Wirefree Bra With Moisture Control Nylon/spandex spandex Imported Silky seamless fabric stretches four ways for flexible fit. Plus, it wicks away moisture to keep you cool and dry. Knit-in light support adds subtle under-bust shaping. Wide straps and fuller back offer gentle all-around smoothing. Wider bottom band helps prevent dig-in and roll-up. Knit-in light support adds subtle under-bust shaping