Designed with quick-drying Omni-Wick fabric, this active shirt offers optimal performance across a wide range of activities — indoors or out. A versatile short sleeve ready to keep you comfortable and dry. A summer tee or a base layer — it delivers moisture wicking abilities that allow you to enjoy it all year long. Columbia offers this 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 chest, measure at the fullest part of the chest, under the armpits and over the shoulder blades, keeping the tape measure firm and level.