Fox Flexair Women Tank The ultimate mountain bike tank for speed and performance. The Flexair Tank combines lightweight, airy materials with superior construction and targeted ventilation. With its racerback design and TruDri moisture-wicking properties, it's the perfect tank for ripping down trails in hot weather and is so comfortable you might forget you're wearing it. TruDri fabrics move sweat away from the body to keep you dry and comfortable. Carvico racerback with laser-cut perforations. Slit hem detail offers maximum mobility. Bonded front neck hem reduces chafing.