The woven-in crinkles do more than give the fabric its characteristic crispness. They also allow just 30% of the fabric to touch your skin at any one time. That keeps fresh air between you and the fabric, while the crinkles absorb moisture and move it off your skin. And both of those effects keep you cooler. Is there any other natural-fiber shirt that actually goes to work to make you more comfortable? 100% cotton. Machine wash. Imported.