Columbia Men's Super Tamiami Long Sleeve Shirt 100% Other Fibers Imported Omni-Shade UPF 40 sun protection Omni-Shade UPF 40 sun protection Antimicrobial treatment protects this product from bacterial growth Vented. Roll-up sleeves with tab holders Omni-Wick moisture Management Omni-Shade UPF 40 sun protection Trement protects this product from Bacterial growth Vented in back