Opti-Dri technology transfers moisture away from the body to keep you cool and dry;UV Block technology keeps skin safe from the suns harmful rays;UPF 50;Stretch fabric moves with you to increase your range of motion;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 TOUR logo on right sleeve;Mens Sizes S-4XL