2.4 oz., 100% polyester ripstop fabric; Omni-Wick?; Quick-dry; Omni-Shade?; UPF 40 sun protection; Anti-microbial treatment protects this product from bacterial growth; Performance fishing gear; Button-down collar; Vented; Columbia PFG logo patch on rod holder on left chest Columbia 7266 Men's Tamiami II Short-Sleeve Shirt