FEATURES OF THE COLUMBIA MEN'S SILVER RIDGE LITE PLAID LS SHIRT Omni-WICK™ Omni-SHADE™ UPF 30 sun protection Antimicrobial treatment protects this product from bacterial growth Vented Roll-up sleeves with tab holders Cool green open pane plaid XXL A fabric technology for the days when the sun is out and sitting inside the house isn't an option. Stay outdoors, but protected with a fabric that blocks Ultraviolet A and B rays (UVA & UVB). Prevents sunburn, without the icky sunscreen application.