The Under Armour HeatGear Armour Fly-By Womens Tank offers exceptional breathability and comfort as you train. Made with Soft, lightweight fabric delivers superior breathability and incredible comfort. Large, open-hole performance mesh back and side panels for superb breathability. Moisture Transport System wicks sweat and Flatlock princess seams create a slim, chafe-free silhouette. Feminine scoop neck and slight drop-tail ensures perfect coverage with a racer-back with keyhole detail. Added 360� reflectivity on logo'soffers extra visibility during low-light runs. Fit: Loose.