ACTIBREEZE™ is an advanced breathability technology developed to help runners keep cool and comfortable. The VENTILATE ACTIBREEZE™ SHORT SLEEVE top was engineered by our expert team for running in warmer conditions. This top’s strategic body-mapped fabric provides advanced ventilation in key heat zones. Lightweight and quick-drying, it’s also made with large slits on the sides that are functional for improving airflow and increasing freedom of movement.