Cool FX built-in technology is engineered to help keep you cool & comfortable when temperatures rise. Stretch: Fabric stretches and moves with you for extra comfort. Slim Fit: Modern fit with a tapered body and slimmer sleeves for a sleek look that flatters most body shapes Button-Down Collar: More relaxed & casual collar; appears neat with or without neckwear so you can dress it up or down Adjustable Cuff: Two button positions allow for a more customized, improved fit No Pocket: Sleek, streamlined design offers a cleaner appearance