The Patagonia Men's A/C Woven Short Sleeve Shirt features a fast-wicking fabric and designed to favor tropical climates. Long lasting performance that will keep you sane in the August heat of the deep south. A/C Shirt has a breezy 100% organic cotton that allows maximum airflow giving the much required air conditioning for your skin. It features a light fabric that rests casually on your skin. A simple construction that features only the necessities: button-through chest pocket and side vents at the straight hem. A reinforced collar keeps its integrity.