Columbia Men’s PFG Tamiami II Long Sleeve Shirt. Designed for cool comfort and functionality over the long haul, this performance button up is crafted from ultra-light ripstop fabric that’s wicking and sun-shielding, with mesh-lined venting at center back. Omni-Shade UPF 40 provides maximum protection for long hours in the sun. Omni-Wick technology actively breathes and pulls moisture away from your skin. Antimicrobial treatment protects this product from bacterial growth. Mesh-lined vent at center back.