Equipped with Columbia's exclusive Insect Blocker technology, the Bug Shield Long-Sleeve Crew helps deter pesky insects so you can enjoy your day outdoors. UPF 30 Omni-Shade technology shields your skin from harmful UV rays. Omni-Wick technology helps keep you dry and comfortable by dispersing sweat for quick evaporation. Antimicrobial treatment minimizes odor. Constructed of 100% polyester fabric. Imported.