Merino Air-Con, an ultra-breathable fabric, keeps the Icon Merino Long-Sleeve Shirt comfortable as the day heats up. The merino regulates temperature in both directions, so the shirt adapts as conditions change. A standard fit and a straight hem keep the shape clean. What Our Gearhead(R) Experts Are Saying:"I wore it through a sweaty stretch, and it dried quickly once I stopped. The merino wicked moisture off my skin and resisted odor, so the shirt was ready to wear again the next day."