Our lightest-weight fishing shirt now comes in a crisp yarn-dye wicking fabric, and mesh-lined ventilation at center back for the ultimate in cool-wearing comfort. - Omni-WICK - Omni-Shade UPF 40 provides maximum protection for long hours in the sun - Antimicrobial treatment protects this shirt from bacterial growth - Mesh-lined vent at center back - 100% polyester **does have minor hole from an ember, see pic