Snug fit.
Front 89% nylon, 10% spandex, 1% olefin; mesh back 72% polyester, 28% spandex.Machine washable. Posture Correcting Neuroband Racerback Bra - Small - White The anatomical construction is reinforced with neuroband tension panels that activate and stimulate specific muscle groups to keep the body upright; the resulting controlled resistance increases core strength while supporting correct alignment of the chest, neck, scapula, and spine. S, M, L, or XL.