Opti-Dri technology transfers moisture away from the body to keep you cool and dry. UV Repel technology keeps skin safe from the sun's harmful rays. UPF 15. Rib knit collar with contrast tipped collar. 3-button placket with Callaway embossed buttons. Double needle hemmed bottom with side vents. Heat seal label provides tag-free comfort. Contrast raised rubber heat transfer Chevron on right sleeve.