Columbia Sportswear Men's Utilizer II Solid Short Sleeve Shirt 100% Polyester Omni-Wick Full Dull Ripstop Imported Quick Dry Fabric Omni-Wick Advanced Evaporation Omni-Shade UPF 50 Sun Protection Antimicrobial, Intended to Protect the Garment from Odor Caused by Bacteria Vented in Back