Ideal for longer trips, our lightest weight fishing shirt features anti-microbial properties to keep it fresh and odor-free over multiple wearings. 100% polyester Omni-Dry Omni-Shade UPF 40 Anti-microbial and moisture-wicking fabric has mechanical stretch for freedom of movement Concealed pockets with hook and loop closure, button down collar PFG convertible sleeves with tabs PFG Venting Buttons are dyed to match shirt Relaxed fit with Columbia logo on left chest