This running top features a virtually seamless design with knit-in ventilation to keep you cool, comfortable and focused on your run. Short sleeves. Nearly seamless design moves smoothly against your skin. Dri-FIT fabric helps keep you dry and comfortable. Knit-in ventilation increases airflow. Ergonomic seams and super stretchy fabric for great range of motion. Reflective elements stand out in low light. Slim fit. Runs true to size.