From Columbia, the Tamiami™ II shirt features: Modern classic fit Button-down collar Long sleeves Button-front closure Front pockets Mesh-lined vent at center back Sun-shielding, moisture-wicking ultra-light, ripstop fabric Omni-Shade® UPF 40 for maximum protection for long hours in the sun Omni-Wick® technology that actively breathes and pulls moisture away from your skin Anti-microbial treatment to protection from bacterial growth Polyester Machine wash/tumble dry Imported.