Opti-Dri technology transfers moisture away from the body to keep you cool and dry. UV Repel technology keeps skin safe from the sunÃ¢Â€Â™s harmful rays. UPF 50. Stretch fabric moves with you to increase your range of motion. Self-fabric collar. Open placket. Feminine ruching shoulder detail. Double needle hemmed bottom with side vents. Heat seal label provides tag-free comfort. Tonal embroidered Callaway logo on back neck.