Sun-blocking and moisture-wicking, this is the perfect shirt for days by the creek, evenings by the campfire, and everything in between. This clean single pocketed shirt looks great sitting around the campfire, and yet retains that indoor button-down collared style. The Omni-Wick fabric is designed to wick away perspiration keeping you comfortable and dry all day, while the patented UPF-50 rated fabric foils harmful UV rays. It's durable, vented, and delivers a flattering fit. Columbia offers this men's shirt in multiple colors and sizes. Available in extended sizing. Regular Fit. To ensure the size you choose is right, utilize our sizing chart and the following measurement instructions: For the sleeves, start at the center back of your neck and measure across the shoulder and down to the sleeve. If you come up with a partial number, round up to the next even number. 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