Features of the Marmot Men's Windshear Short Sleeve Shirt AirExchange Performance Fabric Packable, Air Permeable, Lightweight Performance Woven Fabric Ultraviolet Protection Factor 20 Polyester for Quick-Drying and Wicking Mechnical Stretch for Added Comfort Gusset for Range of Movement Contrast Inside Collar Stand Durable Flat Felled Seams Shirt Tail Hem Single Patch Pocket