Crisp button up, whether you're on vacation or headed for casual Friday, this cotton short-sleeve button-up has a clean, soft style that you'll love. Crafted from a cotton blend, this laidback short sleeve button up is the pillar of all-day comfort and outdoor style. The Columbia Mens Rapid Rivers Printed Short Sleeve Shirt, is a piece of heaven on the patio, or at surfs edge. This stylishly casual short-sleeved shirt is made from a cotton blend with a hint of give, designed for two-way comfort stretch and performance. A single chest pocket, button down collar, and button up class. Columbia offers this mens shirt in multiple patterns and sizes. Extended sizing available. Regular Fit. To ensure the size you choose is right, utilize our sizing chart and the following measurement instructions: For the chest, measure at the fullest part of the chest, under the armpits and over the shoulder blades, keeping the tape measure firm and level.