Huk: Uniting anglers through performance-engineered, technical gear designed to fuel your passion and pursuit no matter when, where or how you fish Huk Icon X Long Sleeve Shirt : A Performance shirt that not only looks great but is comfortable and built with a durable poly-knit construction with mesh underarm and back SUN PROTECTION: This fishing shirt protects your skin from the sun's harmful rays - Huk added the most advanced sun-blocking +50 UPF materials to their apparel to block both UVA and UVB rays MOISTURE TRANSPORT: Keeping dry is critical to keeping warm on the cold water - Hydrophobic or "water-hating" quality within the fibers of this fishing shirt, transport sweat away from skin to the exterior of the shirt where it can evaporate efficiently I.C.E. Technology : I.C.E. (Internal Cooling Element) is a next to skin technology that creates a cooling effect. Fabrics feel cooler to the touch, work to wick perspiration away from you skin, and dry at a more rapid rate to help cool your body