Keep it fresh. Sport Mesh Sleeveless Crew combines our classic Give-N-Go™ fabric with ultralight Mesh side panels for maximum ventilation and comfort. Soft and stretchy, ExOfficio Sport Mesh fabric is as close as you can get to an au naturel feel and still stay clothed. Perfect for active pursuits, it's quick-drying, anti-odor, breathable, and lightweight. While cycling through Patagonia, trekking in Thailand, or trail running in your home range, Sport Mesh will keep you cool, fresh, and comfortable. About Silvadur®: When bacteria are present, Silvadur® goes to work, releasing silver ions that destroy the microbes. The fabric stays fresher, and lasts longer.