Merrell Opti-Wick fabric transfers moisture away from your skin and dries quickly to keep you comfortable and dry. Merrell NADA dye-free colorway. 78% nylon / 22% polyester. 30+ UPF fabric. Quick-drying. Concealed secure-zip chest pocket safeguards valuables. Discreet mesh-lined back yoke vent lets air flow to release heat and moisture. Forward shoulder seam eliminates friction and pinching under bag straps. Merrell woven logo label on sleeve. Metal-encased clear plastic buttons. Roll-up sleeves with herringbone tab closure add releaxed style.