Fish on Mon! The New Bone Flats Shirt is an ultra-light shirt offering maximum UPF 30+ sun-blocking protection, moisture-management comfort with supreme ventilation and super quick drying properties. With this shirt you have amazing temperature regulating features. Constructed of featherweight 1.5 oz Duralite nylon/poly fabric. The secret cooling elements are the mesh panels running down the sleeve and torso which provides tremendous air flow around the torso, keeping you cool in the mid-day sun. Back cape-vent, roll-up sleeves with tabs, 2 secure zippered front pockets, fly rod tab, flip-up sun collar and straight hem for wearing in our out. Whether your chasing bones in the Bahamas, mirages in the desert or martinis in Manhattan, this shirt will deliver the goods in any hot weather situation.