Opti-Dri technology transfers moisture away from the body to keep you cool and dry. Opti-Shield technology creates a layer of UPF 50 protection from the sun’s harmful rays. Opti-Stretch fabric features interwoven layers of spandex to ensure maximum range of motion so the garment moves either with your golf swing or at work Rib knit collar 3-button placket with Callaway embossed buttons Double needle hemmed bottom with side vents Heat seal label provides tag-free comfort Tonal embroidered Chevron inside placket Embossed Chevron on back neck Contrast embroidered Callaway logo on right sleeve.