Honeycomb Tech Fabric Super-lightweight 4-way Stretch Fabric Moisture-wicking Cooling Tech Signature Back Vents Nothing gets you heated like a good workout. That's why it's important to stay cool, which is why we constructed the Athletic Tee the way we did. Our lightweight Honeycomb Tech fabric feels like a second skin and wicks away moisture while letting you breathe, and the signature back vents offer extra airflow for when you give your workout 110%. Just worry about your reps - we've got the rest covered.