5 oz, 100% POLYESTER JERSEY KNIT FABRIC 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+ 3-button placket, self-fabric collar, open sleeve Double needle hemmed bottom with side vents Heat seal label provides tag-free comfort Tonal embroidered Callaway logo on right sleeve