Cool by design. The Active Tank's open back vent and high neckline balance breathability and security for warm weather workouts. The open-back design of the Active Tank works with the fast-drying fabric and extreme ventilation to keep you feeling airy – even on warmer, more active days. So whether you're running errands or running on the road, there's no denying that incredible airflow. Add a dash of lyocell for the natural cooling and anti-odor properties. Then blend with elastane for supreme softness that's stretchy enough for any workout. Finally, top it off with cut to keep you fresh and comfortable all day. No bulky seams or hard points to distract you from your practice. And the high neckline and strategic double hemming keep the top in place without riding up. It's ideal for yoga, warm weather runs, or just pairing with your favorite On layers.