You've heard "don't sweat the small stuff"? Well, it's because of the teeeeeeny tiny small stuff that you'll never sweat in a Breezeshooter® Shirt. The revolutionary ultralight 100% polyester woven fabric is perforated with microscopic, breathable vents for maxed-out airflow. And yet, somehow it's magically sturdy and not-see-through-y. That there's a technical term.