They call them the most comfortable shirts in the world, and they may be right. Mizzen and Main shirts are not cotton, they are made of a performance based fabric that does not wrinkle, stretches 4-ways, wicks moisture and requires no dry cleaning. So basically, summers are hot and this shirt is going to come in handy. Perfect for travel, humid days and any of you in and out of a hot, sticky car. Oh yeah, they look pretty nice too.